Add support for the Trident DRX-J driver, including a card profile for the
PCTV 80e which uses the chip.
Thanks to Trident for allowing the release of this code under a BSD license,
and of course Hauppauge/PCTV for pushing for its release to the community.
[pdickeybeta@gmail.com: modified to fix compilation errors and also to move
the driver files from the drx39xy subdirectory to the frontends directory]
[m.chehab@samsung.com: fix merge conflicts, commented drx-j compilation and
added EM28XX_R06_I2C_CLK setup also to the board setup]
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Those ioctls were added back in 2009, at changeset 1cb662a314
but were never documented. Fortunately, the original commit is
good enough to serve as the basis for documenting it. Also, the
support for it is done by dmxdev implementation.
So, add a proper documentation for it, based on the description
of the original changeset.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Adding V4L2 controls for horizontal and vertical search range in pixels
for motion estimation module in video encoder.
Signed-off-by: Swami Nathan <swaminath.p@samsung.com>
Signed-off-by: Amit Grover <amit.grover@samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
There are several left overs with my old email address.
Remove their occurrences and add myself at CREDITS, to
allow people to be able to reach me on my new addresses.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Adds a missing section to describe the remote controller interface.
The DocBook is just addin the same documentation as written at
Documentation/ABI/testing/sysfs-class-rc, using the DocBook's
way, and dropping timestamps/contact info.
While that means that we'll have the same info on two parts, there
are parts of the remote controller interface that doesn't belong
at Documentation/ABI/, and it makes sense to have everything
on the same place. This also means that we'll need to manually
track to be sure that both places will be synchronized, but, as
it is not expected much changes on it, this sync can be done
manually.
It also adds an introduction that states that the IR is a normal
evdev/input interface, plus the sysfs class nodes.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
All chapters/parts but Remote controllers have the revision
tags inside the body. Move those to remote_controllers.xml and
do some cleanup.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Add and document a generic sysfs based scancode filtering interface for
making use of IR data matching hardware to filter out uninteresting
scancodes. Two filters exist, one for normal operation and one for
filtering scancodes which are permitted to wake the system from suspend.
The following files are added to /sys/class/rc/rc?/:
- filter: normal scancode filter value
- filter_mask: normal scancode filter mask
- wakeup_filter: wakeup scancode filter value
- wakeup_filter_mask: wakeup scancode filter mask
A new s_filter() driver callback is added which must arrange for the
specified filter to be applied at the right time. Drivers can convert
the scancode filter into a raw IR data filter, which can be applied
immediately or later (for wake up filters).
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: linux-media@vger.kernel.org
Cc: Rob Landley <rob@landley.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Briefly document /sys/class/rc/ API for remote controller devices in
Documentation/ABI/teting.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Around 01/14/2014 06:07 PM, Mauro Carvalho Chehab scribbled:
> Em Tue, 14 Jan 2014 17:55:19 +0200
> Georgi Chorbadzhiyski <gf@unixsol.org> escreveu:
>> Around 01/14/2014 05:30 PM, Mauro Carvalho Chehab scribbled:
>>> Em Tue, 14 Jan 2014 17:16:10 +0200
>>> Georgi Chorbadzhiyski <gf@unixsol.org> escreveu:
>>>
>>>> Hi guys, I'm confused the documentation on:
>>>>
>>>> http://linuxtv.org/downloads/v4l-dvb-apis/frontend_fcalls.html#FE_READ_SNR
>>>> http://linuxtv.org/downloads/v4l-dvb-apis/frontend_fcalls.html#FE_READ_SIGNAL_STRENGTH
>>>>
>>>> states that these ioctls return int16_t values but frontend.h states:
>>>>
>>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/dvb/frontend.h
>>>>
>>>> #define FE_READ_SIGNAL_STRENGTH _IOR('o', 71, __u16)
>>>> #define FE_READ_SNR _IOR('o', 72, __u16)
>>>>
>>>> So which one is true?
>>>
>>> Documentation is wrong. The returned values are unsigned. Would you mind send
>>> us a patch fixing it?
>>
>> I would be happy to, but I can't find the repo that holds the documentation.
>
> It is in the Kernel tree, under Documentation/DocBook/media/dvb.
The attached file contains the discussed documentation fixes.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This section was horribly out of date. A lot of references to old and
obsolete behavior have been dropped.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
[m.chehab@samsung.com: removed "Opening and Closing Devices" from the
list of changes, as the patch with such change weren't applied]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
The old table is most definitely wrong. All applications and all
drivers that I have ever tested follow the corrected table. Furthermore,
that's what all applications expect as well. Any drivers that do not
follow the corrected table are broken and should be fixed.
This patch drops the old table and replaces it with the corrected
table. This should prevent a lot of confusion.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Updates for the "Tuners and Modulators", "Video Standards" and
"Digital Video (DV) Timings" sections.
Besides lots of trivial little fixes the main changes are:
- Remove two footnotes from "Video Standards": the first is a discussion
of alternative methods of setting standards, which is pretty pointless
since the standards API is effectively frozen anyway, and the second
points to 'rationale' that makes little or no sense to me.
- Clarify a few things in the "Digital Video (DV) Timings" section.
It was awkwardly formatted as well: there used to be a list with
multiple bullets that has been reduced to a single item, so drop the
list and rewrite that text.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
It's now 2014, so update those copyright years. Also fix a typo in the introduction
and mention that this document also covers output, codec and remote control
devices.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Mauro's old redhat email address is no longer valid, update to the
current email address.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
The big chunks here are the updates for oxygen driver for Xonar DG
devices, which were slipped from the previous pull request. They are
device-specific and thus not too dangerous.
Other than that, all patches are small bug fixes, mainly for Samsung
build fixes, a few HD-audio enhancements, and other misc ASoC fixes.
(And this time ASoC merge is less than Octopus, lucky seven :)
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Merge tag 'sound-fix-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"The big chunks here are the updates for oxygen driver for Xonar DG
devices, which were slipped from the previous pull request. They are
device-specific and thus not too dangerous.
Other than that, all patches are small bug fixes, mainly for Samsung
build fixes, a few HD-audio enhancements, and other misc ASoC fixes.
(And this time ASoC merge is less than Octopus, lucky seven :)"
* tag 'sound-fix-3.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (42 commits)
ALSA: hda/hdmi - allow PIN_OUT to be dynamically enabled
ALSA: hda - add headset mic detect quirks for another Dell laptop
ALSA: oxygen: Xonar DG(X): cleanup and minor changes
ALSA: oxygen: Xonar DG(X): modify high-pass filter control
ALSA: oxygen: Xonar DG(X): modify input select functions
ALSA: oxygen: Xonar DG(X): modify capture volume functions
ALSA: oxygen: Xonar DG(X): use headphone volume control
ALSA: oxygen: Xonar DG(X): modify playback output select
ALSA: oxygen: Xonar DG(X): capture from I2S channel 1, not 2
ALSA: oxygen: Xonar DG(X): move the mixer code into another file
ALSA: oxygen: modify CS4245 register dumping function
ALSA: oxygen: modify adjust_dg_dac_routing function
ALSA: oxygen: Xonar DG(X): modify DAC/ADC parameters function
ALSA: oxygen: Xonar DG(X): modify initialization functions
ALSA: oxygen: Xonar DG(X): add new CS4245 SPI functions
ALSA: oxygen: additional definitions for the Xonar DG/DGX card
ALSA: oxygen: change description of the xonar_dg.c file
ALSA: oxygen: export oxygen_update_dac_routing symbol
ALSA: oxygen: add mute mask for the OXYGEN_PLAY_ROUTING register
ALSA: oxygen: modify the SPI writing function
...
Pull media updates from Mauro Carvalho Chehab:
- a new jpeg codec driver for Samsung Exynos (jpeg-hw-exynos4)
- a new dvb frontend for ds2103 chipset (m88ds2103)
- a new sensor driver for Samsung S5K5BAF UXGA (s5k5baf)
- new drivers for R-Car VSP1
- a new radio driver: radio-raremono
- a new tuner driver for ts2022 chipset (m88ts2022)
- the analog part of em28xx is now a separate module that only
load/runs if the device is not a pure digital TV device
- added a staging driver for bcm2048 radio devices
- the omap 2 video driver (omap24xx) was moved to staging. This driver
is for an old hardware and uses a deprecated Kernel internal API. If
nobody cares enough to fix it, it would be removed on a couple Kernel
releases
- the sn9c102 driver was moved to staging. This driver was replaced by
gspca, and disabled on some distros, as almost all devices are known
to work properly with gspca. It should be removed from kernel on a
couple Kernel releases
- lots of driver fixes, improvements and cleanups
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (421 commits)
[media] media: v4l2-dev: fix video device index assignment
[media] rc-core: reuse device numbers
[media] em28xx-cards: properly initialize the device bitmap
[media] Staging: media: Fix line length exceeding 80 characters in as102_drv.c
[media] Staging: media: Fix line length exceeding 80 characters in as102_fe.c
[media] Staging: media: Fix quoted string split across line in as102_fe.c
[media] media: st-rc: Add reset support
[media] m2m-deinterlace: fix allocated struct type
[media] radio-usb-si4713: fix sparse non static symbol warnings
[media] em28xx-audio: remove needless check before usb_free_coherent()
[media] au0828: Fix sparse non static symbol warning
Revert "[media] go7007-usb: only use go->dev after allocated"
[media] em28xx-audio: provide an error code when URB submit fails
[media] em28xx: fix check for audio only usb interfaces when changing the usb alternate setting
[media] em28xx: fix usb alternate setting for analog and digital video endpoints > 0
[media] em28xx: make 'em28xx_ctrl_ops' static
em28xx-alsa: Fix error patch for init/fini
[media] em28xx-audio: flush work at .fini
[media] drxk: remove the option to load firmware asynchronously
[media] em28xx: adjust period size at runtime
...
Pull core debug changes from Ingo Molnar:
"This contains mostly kernel debugging related updates:
- make hung_task detection more configurable to distros
- add final bits for x86 UV NMI debugging, with related KGDB changes
- update the mailing-list of MAINTAINERS entries I'm involved with"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
hung_task: Display every hung task warning
sysctl: Add neg_one as a standard constraint
x86/uv/nmi, kgdb/kdb: Fix UV NMI handler when KDB not configured
x86/uv/nmi: Fix Sparse warnings
kgdb/kdb: Fix no KDB config problem
MAINTAINERS: Restore "L: linux-kernel@vger.kernel.org" entries
two s390 guest features that need some handling in the host,
and all the PPC changes. The PPC changes include support for
little-endian guests and enablement for new POWER8 features.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more KVM updates from Paolo Bonzini:
"Second batch of KVM updates. Some minor x86 fixes, two s390 guest
features that need some handling in the host, and all the PPC changes.
The PPC changes include support for little-endian guests and
enablement for new POWER8 features"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (45 commits)
x86, kvm: correctly access the KVM_CPUID_FEATURES leaf at 0x40000101
x86, kvm: cache the base of the KVM cpuid leaves
kvm: x86: move KVM_CAP_HYPERV_TIME outside #ifdef
KVM: PPC: Book3S PR: Cope with doorbell interrupts
KVM: PPC: Book3S HV: Add software abort codes for transactional memory
KVM: PPC: Book3S HV: Add new state for transactional memory
powerpc/Kconfig: Make TM select VSX and VMX
KVM: PPC: Book3S HV: Basic little-endian guest support
KVM: PPC: Book3S HV: Add support for DABRX register on POWER7
KVM: PPC: Book3S HV: Prepare for host using hypervisor doorbells
KVM: PPC: Book3S HV: Handle new LPCR bits on POWER8
KVM: PPC: Book3S HV: Handle guest using doorbells for IPIs
KVM: PPC: Book3S HV: Consolidate code that checks reason for wake from nap
KVM: PPC: Book3S HV: Implement architecture compatibility modes for POWER8
KVM: PPC: Book3S HV: Add handler for HV facility unavailable
KVM: PPC: Book3S HV: Flush the correct number of TLB sets on POWER8
KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs
KVM: PPC: Book3S HV: Align physical and virtual CPU thread numbers
KVM: PPC: Book3S HV: Don't set DABR on POWER8
kvm/ppc: IRQ disabling cleanup
...
Pull btrfs updates from Chris Mason:
"This is a pretty big pull, and most of these changes have been
floating in btrfs-next for a long time. Filipe's properties work is a
cool building block for inheriting attributes like compression down on
a per inode basis.
Jeff Mahoney kicked in code to export filesystem info into sysfs.
Otherwise, lots of performance improvements, cleanups and bug fixes.
Looks like there are still a few other small pending incrementals, but
I wanted to get the bulk of this in first"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (149 commits)
Btrfs: fix spin_unlock in check_ref_cleanup
Btrfs: setup inode location during btrfs_init_inode_locked
Btrfs: don't use ram_bytes for uncompressed inline items
Btrfs: fix btrfs_search_slot_for_read backwards iteration
Btrfs: do not export ulist functions
Btrfs: rework ulist with list+rb_tree
Btrfs: fix memory leaks on walking backrefs failure
Btrfs: fix send file hole detection leading to data corruption
Btrfs: add a reschedule point in btrfs_find_all_roots()
Btrfs: make send's file extent item search more efficient
Btrfs: fix to catch all errors when resolving indirect ref
Btrfs: fix protection between walking backrefs and root deletion
btrfs: fix warning while merging two adjacent extents
Btrfs: fix infinite path build loops in incremental send
btrfs: undo sysfs when open_ctree() fails
Btrfs: fix snprintf usage by send's gen_unique_name
btrfs: fix defrag 32-bit integer overflow
btrfs: sysfs: list the NO_HOLES feature
btrfs: sysfs: don't show reserved incompat feature
btrfs: call permission checks earlier in ioctls and return EPERM
...
Merge misc fixes from Andrew Morton:
"A few hotfixes and various leftovers which were awaiting other merges.
Mainly movement of zram into mm/"
* emailed patches fron Andrew Morton <akpm@linux-foundation.org>: (25 commits)
memcg: fix mutex not unlocked on memcg_create_kmem_cache fail path
Documentation/filesystems/vfs.txt: update file_operations documentation
mm, oom: base root bonus on current usage
mm: don't lose the SOFT_DIRTY flag on mprotect
mm/slub.c: fix page->_count corruption (again)
mm/mempolicy.c: fix mempolicy printing in numa_maps
zram: remove zram->lock in read path and change it with mutex
zram: remove workqueue for freeing removed pending slot
zram: introduce zram->tb_lock
zram: use atomic operation for stat
zram: remove unnecessary free
zram: delay pending free request in read path
zram: fix race between reset and flushing pending work
zsmalloc: add maintainers
zram: add zram maintainers
zsmalloc: add copyright
zram: add copyright
zram: remove old private project comment
zram: promote zram from staging
zsmalloc: move it under mm
...
These are changes that arrived a little late but were considered
self-contained enough to still go in for v3.14.
They are all device tree updtes this time around, and mainly for
Broadcom SoCs.
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Merge tag 'late-dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC late changes from Kevin Hilman:
"These are changes that arrived a little late but were considered
self-contained enough to still go in for v3.14.
They are all device tree updtes this time around, and mainly for
Broadcom SoCs"
* tag 'late-dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: moxart: move fixed rate clock child node to board level dts
clk: bcm281xx: define kona clock binding
ARM: dts: add usb udc support to bcm281xx
ARM: dts: Specify clocks for timer on bcm11351
Documentation: dt: kona-timer: Add clocks property
ARM: dts: Specify clocks for SDHCIs on bcm11351
Documentation: dt: kona-sdhci: Add clocks property
ARM: dts: Specify clocks for UARTs on bcm11351
ARM: dts: bcm281xx: Add i2c busses
ARM: dts: Declare clocks as fixed on bcm11351
ARM: dts: bcm28155-ap: Enable all the i2c busses
Pull more powerpc bits from Ben Herrenschmidt:
"Here are a few more powerpc bits for this merge window. The bulk is
made of two pull requests from Scott and Anatolij that I had missed
previously (they arrived while I was away). Since both their branches
are in -next independently, and the content has been around for a
little while, they can still go in.
The rest is mostly bug and regression fixes, a small series of
cleanups to our pseries cpuidle code (including moving it to the right
place), and one new cpuidle bakend for the powernv platform. I also
wired up the new sched_attr syscalls"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (37 commits)
powerpc: Wire up sched_setattr and sched_getattr syscalls
powerpc/hugetlb: Replace __get_cpu_var with get_cpu_var
powerpc: Make sure "cache" directory is removed when offlining cpu
powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space
powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform.
powerpc/pseries/cpuidle: smt-snooze-delay cleanup.
powerpc/pseries/cpuidle: Remove MAX_IDLE_STATE macro.
powerpc/pseries/cpuidle: Make cpuidle-pseries backend driver a non-module.
powerpc/pseries/cpuidle: Use cpuidle_register() for initialisation.
powerpc/pseries/cpuidle: Move processor_idle.c to drivers/cpuidle.
powerpc: Fix 32-bit frames for signals delivered when transactional
powerpc/iommu: Fix initialisation of DART iommu table
powerpc/numa: Fix decimal permissions
powerpc/mm: Fix compile error of pgtable-ppc64.h
powerpc: Fix hw breakpoints on !HAVE_HW_BREAKPOINT configurations
clk: corenet: Adds the clock binding
powerpc/booke64: Guard e6500 tlb handler with CONFIG_PPC_FSL_BOOK3E
powerpc/512x: dts: add MPC5125 clock specs
powerpc/512x: clk: support MPC5121/5123/5125 SoC variants
powerpc/512x: clk: enforce even SDHC divider values
...
->readv, ->writev and ->sendfile have been removed while ->show_fdinfo
has been added. The documentation should reflect this.
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A 3% of system memory bonus is sometimes too excessive in comparison to
other processes.
With commit a63d83f427 ("oom: badness heuristic rewrite"), the OOM
killer tries to avoid killing privileged tasks by subtracting 3% of
overall memory (system or cgroup) from their per-task consumption. But
as a result, all root tasks that consume less than 3% of overall memory
are considered equal, and so it only takes 33+ privileged tasks pushing
the system out of memory for the OOM killer to do something stupid and
kill dhclient or other root-owned processes. For example, on a 32G
machine it can't tell the difference between the 1M agetty and the 10G
fork bomb member.
The changelog describes this 3% boost as the equivalent to the global
overcommit limit being 3% higher for privileged tasks, but this is not
the same as discounting 3% of overall memory from _every privileged task
individually_ during OOM selection.
Replace the 3% of system memory bonus with a 3% of current memory usage
bonus.
By giving root tasks a bonus that is proportional to their actual size,
they remain comparable even when relatively small. In the example
above, the OOM killer will discount the 1M agetty's 256 badness points
down to 179, and the 10G fork bomb's 262144 points down to 183500 points
and make the right choice, instead of discounting both to 0 and killing
agetty because it's first in the task list.
Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove the old private compcache project address so upcoming patches
should be sent to LKML because we Linux kernel community will take care.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Zram has lived in staging for a LONG LONG time and have been
fixed/improved by many contributors so code is clean and stable now. Of
course, there are lots of product using zram in real practice.
The major TV companys have used zram as swap since two years ago and
recently our production team released android smart phone with zram
which is used as swap, too and recently Android Kitkat start to use zram
for small memory smart phone. And there was a report Google released
their ChromeOS with zram, too and cyanogenmod have been used zram long
time ago. And I heard some disto have used zram block device for tmpfs.
In addition, I saw many report from many other peoples. For example,
Lubuntu start to use it.
The benefit of zram is very clear. With my experience, one of the
benefit was to remove jitter of video application with backgroud memory
pressure. It would be effect of efficient memory usage by compression
but more issue is whether swap is there or not in the system. Recent
mobile platforms have used JAVA so there are many anonymous pages. But
embedded system normally are reluctant to use eMMC or SDCard as swap
because there is wear-leveling and latency issues so if we do not use
swap, it means we can't reclaim anoymous pages and at last, we could
encounter OOM kill. :(
Although we have real storage as swap, it was a problem, too. Because
it sometime ends up making system very unresponsible caused by slow swap
storage performance.
Quote from Luigi on Google
"Since Chrome OS was mentioned: the main reason why we don't use swap
to a disk (rotating or SSD) is because it doesn't degrade gracefully
and leads to a bad interactive experience. Generally we prefer to
manage RAM at a higher level, by transparently killing and restarting
processes. But we noticed that zram is fast enough to be competitive
with the latter, and it lets us make more efficient use of the
available RAM. " and he announced.
http://www.spinics.net/lists/linux-mm/msg57717.html
Other uses case is to use zram for block device. Zram is block device
so anyone can format the block device and mount on it so some guys on
the internet start zram as /var/tmp.
http://forums.gentoo.org/viewtopic-t-838198-start-0.html
Let's promote zram and enhance/maintain it instead of removing.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Nitin Gupta <ngupta@vflare.org>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull core block IO changes from Jens Axboe:
"The major piece in here is the immutable bio_ve series from Kent, the
rest is fairly minor. It was supposed to go in last round, but
various issues pushed it to this release instead. The pull request
contains:
- Various smaller blk-mq fixes from different folks. Nothing major
here, just minor fixes and cleanups.
- Fix for a memory leak in the error path in the block ioctl code
from Christian Engelmayer.
- Header export fix from CaiZhiyong.
- Finally the immutable biovec changes from Kent Overstreet. This
enables some nice future work on making arbitrarily sized bios
possible, and splitting more efficient. Related fixes to immutable
bio_vecs:
- dm-cache immutable fixup from Mike Snitzer.
- btrfs immutable fixup from Muthu Kumar.
- bio-integrity fix from Nic Bellinger, which is also going to stable"
* 'for-3.14/core' of git://git.kernel.dk/linux-block: (44 commits)
xtensa: fixup simdisk driver to work with immutable bio_vecs
block/blk-mq-cpu.c: use hotcpu_notifier()
blk-mq: for_each_* macro correctness
block: Fix memory leak in rw_copy_check_uvector() handling
bio-integrity: Fix bio_integrity_verify segment start bug
block: remove unrelated header files and export symbol
blk-mq: uses page->list incorrectly
blk-mq: use __smp_call_function_single directly
btrfs: fix missing increment of bi_remaining
Revert "block: Warn and free bio if bi_end_io is not set"
block: Warn and free bio if bi_end_io is not set
blk-mq: fix initializing request's start time
block: blk-mq: don't export blk_mq_free_queue()
block: blk-mq: make blk_sync_queue support mq
block: blk-mq: support draining mq queue
dm cache: increment bi_remaining when bi_end_io is restored
block: fixup for generic bio chaining
block: Really silence spurious compiler warnings
block: Silence spurious compiler warnings
block: Kill bio_pair_split()
...
Pull nfsd updates from Bruce Fields:
- Handle some loose ends from the vfs read delegation support.
(For example nfsd can stop breaking leases on its own in a
fewer places where it can now depend on the vfs to.)
- Make life a little easier for NFSv4-only configurations
(thanks to Kinglong Mee).
- Fix some gss-proxy problems (thanks Jeff Layton).
- miscellaneous bug fixes and cleanup
* 'for-3.14' of git://linux-nfs.org/~bfields/linux: (38 commits)
nfsd: consider CLAIM_FH when handing out delegation
nfsd4: fix delegation-unlink/rename race
nfsd4: delay setting current_fh in open
nfsd4: minor nfs4_setlease cleanup
gss_krb5: use lcm from kernel lib
nfsd4: decrease nfsd4_encode_fattr stack usage
nfsd: fix encode_entryplus_baggage stack usage
nfsd4: simplify xdr encoding of nfsv4 names
nfsd4: encode_rdattr_error cleanup
nfsd4: nfsd4_encode_fattr cleanup
minor svcauth_gss.c cleanup
nfsd4: better VERIFY comment
nfsd4: break only delegations when appropriate
NFSD: Fix a memory leak in nfsd4_create_session
sunrpc: get rid of use_gssp_lock
sunrpc: fix potential race between setting use_gss_proxy and the upcall rpc_clnt
sunrpc: don't wait for write before allowing reads from use-gss-proxy file
nfsd: get rid of unused function definition
Define op_iattr for nfsd4_open instead using macro
NFSD: fix compile warning without CONFIG_NFSD_V3
...
Pull drm updates from Dave Airlie:
"Been a bit busy, first week of kids school, and waiting on other trees
to go in before I could send this, so its a bit later than I'd
normally like.
Highlights:
- core:
timestamp fixes, lots of misc cleanups
- new drivers:
bochs virtual vga
- vmwgfx:
major overhaul for their nextgen virt gpu.
- i915:
runtime D3 on HSW, watermark fixes, power well work, fbc fixes,
bdw is no longer prelim.
- nouveau:
gk110/208 acceleration, more pm groundwork, old overlay support
- radeon:
dpm rework and clockgating for CIK, pci config reset, big endian
fixes
- tegra:
panel support and DSI support, build as module, prime.
- armada, omap, gma500, rcar, exynos, mgag200, cirrus, ast:
fixes
- msm:
hdmi support for mdp5"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (595 commits)
drm/nouveau: resume display if any later suspend bits fail
drm/nouveau: fix lock unbalance in nouveau_crtc_page_flip
drm/nouveau: implement hooks for needed for drm vblank timestamping support
drm/nouveau/disp: add a method to fetch info needed by drm vblank timestamping
drm/nv50: fill in crtc mode struct members from crtc_mode_fixup
drm/radeon/dce8: workaround for atom BlankCrtc table
drm/radeon/DCE4+: clear bios scratch dpms bit (v2)
drm/radeon: set si_notify_smc_display_change properly
drm/radeon: fix DAC interrupt handling on DCE5+
drm/radeon: clean up active vram sizing
drm/radeon: skip async dma init on r6xx
drm/radeon/runpm: don't runtime suspend non-PX cards
drm/radeon: add ring to fence trace functions
drm/radeon: add missing trace point
drm/radeon: fix VMID use tracking
drm: ast,cirrus,mgag200: use drm_can_sleep
drm/gma500: Lock struct_mutex around cursor updates
drm/i915: Fix the offset issue for the stolen GEM objects
DRM: armada: fix missing DRM_KMS_FB_HELPER select
drm/i915: Decouple GPU error reporting from ring initialisation
...
Pull slave-dma updates from Vinod Koul:
- new driver for BCM2835 used in R-pi
- new driver for MOXA ART
- dma_get_any_slave_channel API for DT based systems
- minor fixes and updates spread acrooss driver
[ The fsl-ssi dual fifo mode support addition clashed badly with the
other changes to fsl-ssi that came in through the sound merge. I did
a very rough cut at fixing up the conflict, but Nicolin Chen (author
of both sides) will need to verify and check things ]
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
dmaengine: mmp_pdma: fix mismerge
dma: pl08x: Export pl08x_filter_id
acpi-dma: align documentation with kernel-doc format
dma: fix vchan_cookie_complete() debug print
DMA: dmatest: extend the "device" module parameter to 32 characters
drivers/dma: fix error return code
dma: omap: Set debug level to debugging messages
dmaengine: fix kernel-doc style typos for few comments
dma: tegra: add support for Tegra148/124
dma: dw: use %pad instead of casting dma_addr_t
dma: dw: join split up messages
dma: dw: fix style of multiline comment
dmaengine: k3dma: fix sparse warnings
dma: pl330: Use dma_get_slave_channel() in the of xlate callback
dma: pl330: Differentiate between submitted and issued descriptors
dmaengine: sirf: Add device_slave_caps interface
DMA: Freescale: change BWC from 256 bytes to 1024 bytes
dmaengine: Add MOXA ART DMA engine driver
dmaengine: Add DMA_PRIVATE to BCM2835 driver
dma: imx-sdma: Assign a default script number for ROM firmware cases
...
Pull more i2c updates from Wolfram Sang:
"Mostly bugfixes, small but wanted cleanups, and Paul's init.h removal
applied"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rcar: fix NACK error code
i2c: update i2c_algorithm documentation
i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted
i2c: rcar: do not print error if device nacks transfer
i2c: rely on driver core when sanitizing devices
i2c: delete non-required instances of include <linux/init.h>
i2c: acorn: is tristate and should use module.h
i2c: piix4: Standardize log messages
i2c: piix4: Use different message for AMD Auxiliary SMBus Controller
i2c: piix4: Add support for AMD ML and CZ SMBus changes
Pull hwmon updates from Jean Delvare:
"This include it87 driver improvements, and a tree-wide change of my
e-mail address"
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
Update Jean Delvare's e-mail address
hwmon: (it87) Print proper names for the IT8771E and IT8772E
hwmon: (it87) Add support for the ITE IT8603E
Pull networking fixes from David Miller:
"Several fixups, of note:
1) Fix unlock of not held spinlock in RXRPC code, from Alexey
Khoroshilov.
2) Call pci_disable_device() from the correct shutdown path in bnx2x
driver, from Yuval Mintz.
3) Fix qeth build on s390 for some configurations, from Eugene
Crosser.
4) Cure locking bugs in bond_loadbalance_arp_mon(), from Ding
Tianhong.
5) Must do netif_napi_add() before registering netdevice in sky2
driver, from Stanislaw Gruszka.
6) Fix lost bug fix during merge due to code movement in ieee802154,
noticed and fixed by the eagle eyed Stephen Rothwell.
7) Get rid of resource leak in xen-netfront driver, from Annie Li.
8) Bounds checks in qlcnic driver are off by one, from Manish Chopra.
9) TPROXY can leak sockets when TCP early demux is enabled, fix from
Holger Eitzenberger"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (32 commits)
qeth: fix build of s390 allmodconfig
bonding: fix locking in bond_loadbalance_arp_mon()
tun: add device name(iff) field to proc fdinfo entry
DT: net: davinci_emac: "ti, davinci-no-bd-ram" property is actually optional
DT: net: davinci_emac: "ti, davinci-rmii-en" property is actually optional
bnx2x: Fix generic option settings
net: Fix warning on make htmldocs caused by skbuff.c
llc: remove noisy WARN from llc_mac_hdr_init
qlcnic: Fix loopback test failure
qlcnic: Fix tx timeout.
qlcnic: Fix initialization of vlan list.
qlcnic: Correct off-by-one errors in bounds checks
net: Document promote_secondaries
net: gre: use icmp_hdr() to get inner ip header
i40e: Add missing braces to i40e_dcb_need_reconfig()
xen-netfront: fix resource leak in netfront
net: 6lowpan: fixup for code movement
hyperv: Add support for physically discontinuous receive buffer
sky2: initialize napi before registering device
net: Fix memory leak if TPROXY used with TCP early demux
...
Prior to commit fe35004fbf ("mm: avoid swapping out with
swappiness==0") setting swappiness to 0, reclaim code could still evict
recently used user anonymous memory to swap even though there is a
significant amount of RAM used for page cache.
The behaviour of setting swappiness to 0 has since changed. When set,
the reclaim code does not initiate swap until the amount of free pages
and file-backed pages, is less than the high water mark in a zone.
Let's update the documentation to reflect this.
[akpm@linux-foundation.org: remove comma, per Randy]
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Bryn M. Reeves <bmr@redhat.com>
Cc: Satoru Moriya <satoru.moriya@hds.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add support for IT8603E.
This closes bug #57861:
https://bugzilla.kernel.org/show_bug.cgi?id=57861
[JD: Fixes and clean-ups.]
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
The "ti,davinci-no-bd-ram" property for the DaVinci EMAC binding simply can't be
required one, as it's boolean (which means it's absent if false).
While at it, document the property better...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Though described as required, the "ti,davinci-rmii-en" property for the DaVinci
EMAC binding seems actually optional, as the driver should happily work without
it; the property is not specified either in the example device node or in the
actual EMAC device node for DA850 device tree, only AM3517 one.
While at it, document the property better...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
<<
This contains a fix for a chroma_defconfig build break that was
introduced by e6500 tablewalk support, and a device tree binding patch
that missed the previous pull request due to some last-minute polishing.
>>
- Add me (Brian Norris) as an additional MTD maintainer (it'd be nice to get
David's "ack" for this; I'm sure he approves, but he's been pretty silent
lately)
- Add Ezequiel Garcie as maintainer for the pxa3xx NAND driver
- Last (?) round of pxa3xx improvements for supporting Armada 370/XP
- Typical churn in driver boilerplate (OOM messages, printk()'s, devm_*, etc.)
- Quad read mode support for SPI NOR driver (m25p80)
- Update Davinci NAND driver to prepare for use on new platforms
- Begin to kill off NAND_MAX_{PAGE,OOB}SIZE macros; more work is pending
- Miscellaneous NAND device support (new IDs)
- Add READ RETRY support for Micron MLC NAND
- Support new GPMI NAND ECC layout device-tree binding
- Avoid mapping stack/vmalloc() memory for GPMI NAND DMA
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Merge tag 'for-linus-20140127' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris:
- Add me (Brian Norris) as an additional MTD maintainer (it'd be nice to get
David's "ack" for this; I'm sure he approves, but he's been pretty silent
lately)
- Add Ezequiel Garcie as maintainer for the pxa3xx NAND driver
- Last (?) round of pxa3xx improvements for supporting Armada 370/XP
- Typical churn in driver boilerplate (OOM messages, printk()'s, devm_*, etc.)
- Quad read mode support for SPI NOR driver (m25p80)
- Update Davinci NAND driver to prepare for use on new platforms
- Begin to kill off NAND_MAX_{PAGE,OOB}SIZE macros; more work is pending
- Miscellaneous NAND device support (new IDs)
- Add READ RETRY support for Micron MLC NAND
- Support new GPMI NAND ECC layout device-tree binding
- Avoid mapping stack/vmalloc() memory for GPMI NAND DMA
* tag 'for-linus-20140127' of git://git.infradead.org/linux-mtd: (151 commits)
mtd: gpmi: add sanity check when mapping DMA for read_buf/write_buf
mtd: gpmi: allocate a proper buffer for non ECC read/write
mtd: m25p80: Set rx_nbits for Quad SPI transfers
mtd: m25p80: Enable Quad SPI read transfers for s25fl512s
mtd: s3c2410: Merge plat/regs-nand.h into s3c2410.c
mtd: mtdram: add missing 'const'
mtd: m25p80: assign default read command
mtd: nuc900_nand: remove redundant return value check of platform_get_resource()
mtd: plat_nand: remove redundant return value check of platform_get_resource()
mtd: nand: add Intel manufacturer ID
mtd: nand: add SanDisk manufacturer ID
mtd: nand: add support for Samsung K9LCG08U0B
mtd: nand: pxa3xx: Add support for 2048 bytes page size devices
mtd: m25p80: Use OPCODE_QUAD_READ_4B for 4-byte addressing
mtd: nand: don't use {read,write}_buf for 8-bit transfers
mtd: nand: use __packed shorthand
mtd: nand: support Micron READ RETRY
mtd: nand: add generic READ RETRY support
mtd: nand: add ONFI vendor block for Micron
mtd: nand: localize ECC failures per page
...
Pull LED subsystem update from Bryan Wu:
"Basically this cycle is mostly cleanup for LED subsystem"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: s3c24xx: Remove hardware.h inclusion
leds: replace list_for_each with list_for_each_entry
leds: kirkwood: Cleanup in header files
leds: pwm: Remove a warning on non-DT platforms
leds: leds-pwm: fix duty time overflow.
leds: leds-mc13783: Remove unneeded mc13xxx_{un}lock
leds: leds-mc13783: Remove duplicate field in platform data
drivers: leds: leds-tca6507: check CONFIG_GPIOLIB whether defined for 'gpio_base'
leds: lp5523: Support LED MUX configuration on running a pattern
leds: lp5521/5523: Fix multiple engine usage bug
LEDS: tca6507 - fix up some comments.
LEDS: tca6507: add device-tree support for GPIO configuration.
LEDS: tca6507 - fix bugs in parsing of device-tree configuration.
dominated by platform support for Qualcomm's MSM SoCs, DT binding
updates for TI's OMAP-ish processors and additional support for Samsung
chips. Additionally there are other smaller clock driver changes and
several last minute fixes. This pull request also includes the HiSilicon
support that depends on the already-merged arm-soc pull request.
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Merge tag 'clk-for-linus-3.14-part2' of git://git.linaro.org/people/mike.turquette/linux
Pull more clock framework changes from Mike Turquette:
"The second half of the clock framework pull requeust for 3.14 is
dominated by platform support for Qualcomm's MSM SoCs, DT binding
updates for TI's OMAP-ish processors and additional support for
Samsung chips.
Additionally there are other smaller clock driver changes and several
last minute fixes. This pull request also includes the HiSilicon
support that depends on the already-merged arm-soc pull request"
[ Fix up stupid compile error in the source tree with evil merge - Grumpy Linus ]
* tag 'clk-for-linus-3.14-part2' of git://git.linaro.org/people/mike.turquette/linux: (49 commits)
clk: sort Makefile
clk: sunxi: fix overflow when setting up divided factors
clk: Export more clk-provider functions
dt-bindings: qcom: Fix warning with duplicate dt define
clk: si5351: remove variant from platform_data
clk: samsung: Remove unneeded semicolon
clk: qcom: Fix modular build
ARM: OMAP3: use DT clock init if DT data is available
ARM: AM33xx: remove old clock data and link in new clock init code
ARM: AM43xx: Enable clock init
ARM: OMAP: DRA7: Enable clock init
ARM: OMAP4: remove old clock data and link in new clock init code
ARM: OMAP2+: io: use new clock init API
ARM: OMAP2+: PRM: add support for initializing PRCM clock modules from DT
ARM: OMAP3: hwmod: initialize clkdm from clkdm_name
ARM: OMAP: hwmod: fix an incorrect clk type cast with _get_clkdm
ARM: OMAP2+: clock: use driver API instead of direct memory read/write
ARM: OMAP2+: clock: add support for indexed memmaps
ARM: dts: am43xx clock data
ARM: dts: AM35xx: use DT clock data
...
