Jens Axboe 0034af0365 block: make /sys/block/<dev>/queue/discard_max_bytes writeable ... Lots of devices support huge discard sizes these days. Depending on how the device handles them internally, huge discards can introduce massive latencies (hundreds of msec) on the device side. We have a sysfs file, discard_max_bytes, that advertises the max hardware supported discard size. Make this writeable, and split the settings into a soft and hard limit. This can be set from 'discard_granularity' and up to the hardware limit. Add a new sysfs file, 'discard_max_hw_bytes', that shows the hw set limit. Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2015-07-17 08:41:53 -06:00
..
ABI	platform-drivers-x86 got 4.2	2015-07-01 18:55:34 -07:00
accounting	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
acpi	ACPI: Constify ACPI device IDs in documentation	2015-06-19 01:14:15 +02:00
aoe
arm	Allwinner late changes for 4.2	2015-07-09 15:08:44 -07:00
arm64	arm64: use fixmap region for permanent FDT mapping	2015-06-02 16:31:33 +01:00
auxdisplay	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
backlight
blackfin	Docs: blackfin: Use new switch macro SAMPLE_IRQ_TIMER instead of IRQ_TIMER5	2015-05-07 09:35:14 -06:00
block	block: make /sys/block/<dev>/queue/discard_max_bytes writeable	2015-07-17 08:41:53 -06:00
blockdev	zram: add dynamic device add/remove functionality	2015-06-25 17:00:36 -07:00
bus-devices
cdrom
cgroups	Merge branch 'for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2015-06-26 19:50:04 -07:00
cma	cma: debug: document new debugfs interface	2015-04-14 16:49:00 -07:00
connector
console
cpu-freq	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
cpuidle
cris
crypto	crypto: doc - AEAD / RNG AF_ALG interface	2015-03-09 21:06:18 +11:00
development-process	Documentation: remove outdated references to the linux-next wiki	2014-10-28 09:06:11 -04:00
device-mapper	dm stats: collect and report histogram of IO latencies	2015-06-17 12:40:40 -04:00
devicetree	Minor fixes for omaps against v4.2-rc1. Mostly just minor dts changes	2015-07-09 15:38:16 -07:00
dmaengine	Merge branch 'topic/pxa' into for-linus	2015-06-25 09:21:58 +05:30
DocBook	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2015-06-26 13:18:51 -07:00
driver-model	Char/Misc driver patches for 4.1-rc1	2015-04-21 09:42:58 -07:00
dvb
early-userspace
EDID
extcon
fault-injection
fb
features	Documentation/features: Explain kernel feature descriptions and add visualization script	2015-06-03 12:59:38 +02:00
filesystems	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
firmware_class
fmc
frv
gpio	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
hid	HID: sensor: Update document for custom sensor	2015-04-10 22:22:56 +02:00
hwmon	hwmon: Document which I2C addresses can be probed	2015-07-03 14:39:05 +02:00
i2c	Merge branch 'i2c/for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2015-06-25 18:42:39 -07:00
ia64	virtual: Documentation: simplify and generalize paravirt_ops.txt	2015-02-13 17:15:44 +10:30
ide
infiniband
input	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
ioctl	fuse: device fd clone	2015-07-01 16:26:08 +02:00
isdn
ja_JP	Doc: ja_JP: Fix typo in HOWTO	2015-06-08 16:43:09 -06:00
kbuild	kbuild: Allow arch Makefiles to override {cpp,ld,c}flags	2015-07-06 11:09:00 +05:30
kdump	kernel: add panic_on_warn	2014-12-10 17:41:10 -08:00
ko_KR
laptops	Move freefall program from Documentation/ to tools/	2015-06-08 16:42:07 -06:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2015-07-01 19:09:11 -07:00
locking	Documentation changes for 3.20	2015-02-11 13:03:11 -08:00
m68k
memory-devices
metag
mic	Char/Misc driver patches for 4.2-rc1	2015-06-26 14:51:15 -07:00
mips
misc-devices	Pratyush Anand has moved	2015-06-25 17:00:38 -07:00
mmc
mn10300
mtd
namespaces
netlabel
networking	netconsole: implement extended console support	2015-06-25 17:00:39 -07:00
nfc	NFC: Fix typo in nfc-hci.txt	2015-06-08 23:15:45 +02:00
nios2	Documentation: Add documentation for Nios2 architecture	2014-12-08 12:56:06 +08:00
nvdimm	libnvdimm: Non-Volatile Devices	2015-06-26 11:23:38 -04:00
parisc
PCI	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
pcmcia	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
phy
platform
power	PM / hibernate: clarify resume documentation	2015-07-07 01:18:11 +02:00
powerpc	powerpc/tm: Abort syscalls in active transactions	2015-06-19 17:10:28 +10:00
pps	Doc:pps: Fix typo in pps.txt	2015-06-22 09:59:28 -06:00
prctl	Documentation/prctl: don't build tsc tests when cross compiling	2015-06-22 16:05:04 -06:00
pti
ptp	ptp: restore the makefile for building the test program.	2014-10-24 16:07:10 -04:00
rapidio
RCU	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
s390	qeth: OSA version of SETBRIDGEPORT command	2015-05-18 12:14:17 -04:00
scheduler	sched/dl/Documentation: Split Section 3	2015-05-19 08:39:21 +02:00
scsi	Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block	2015-06-25 15:22:36 -07:00
security	Smack: allow multiple labels in onlycap	2015-06-02 11:53:42 -07:00
serial	Doc: serial-rs485.txt: update RS485 driver interface	2015-06-12 17:39:51 -07:00
sh
sound	Doc: sound:oss: Fix typo in sound/oss	2015-06-09 17:23:00 +02:00
spi	Documentation/spi/spidev_test.c: fix warning	2015-04-17 09:04:12 -04:00
sysctl	coredump: use from_kuid/kgid when formatting corename	2015-06-25 17:00:43 -07:00
target	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-07-04 14:13:43 -07:00
thermal	thermal: support slope and offset coefficients	2015-05-11 19:46:52 -07:00
timers	documentation: Update NO_HZ_FULL interaction with POSIX timers	2015-02-26 11:57:29 -08:00
tpm
trace	Documentation: tracing: fix grammar	2015-05-13 15:39:04 -04:00
usb	USB patches for 4.2-rc1	2015-06-26 15:59:26 -07:00
vDSO	Documentation/vDSO: don't build tests when cross compiling	2015-06-22 16:04:57 -06:00
video4linux	[media] Documentation: update cardlists	2015-06-09 18:43:47 -03:00
virtual	KVM: x86: mark legacy PCI device assignment as deprecated	2015-06-05 17:26:39 +02:00
vm	zswap: runtime enable/disable	2015-06-25 17:00:37 -07:00
w1	w1: Add support for DS28EA00 sequence to w1-therm	2015-05-24 12:08:59 -07:00
watchdog	watchdog: omap_wdt: early_enable module parameter	2015-07-01 16:43:17 +02:00
wimax
x86	x86/asm/entry/64: Update path names	2015-07-02 11:08:50 +02:00
xtensa
zh_CN	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
00-INDEX	Update of Documentation/dmaengine/00-INDEX	2014-12-29 15:28:24 -07:00
applying-patches.txt	Documentation: change "&" to "and" in Documentation/applying-patches.txt	2014-09-26 11:10:11 +02:00
assoc_array.txt
atomic_ops.txt	documentation: Clarify memory-barrier semantics of atomic operations	2015-02-26 11:57:31 -08:00
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt	binfmt_misc: touch up documentation a bit	2014-10-14 02:18:16 +02:00
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt	rmap: drop support of non-linear mappings	2015-02-10 14:30:31 -08:00
Changes	Documentation: GNU is frequently spelled Gnu	2014-12-29 15:33:17 -07:00
circular-buffers.txt
clk.txt	clk: Update docs after removal of clk-private.h	2015-05-13 12:32:51 -07:00
coccinelle.txt
CodeOfConflict	Code of Conflict	2015-02-27 11:44:24 -08:00
CodingStyle	Documentation/CodingStyle: fix example macro parenthesis imbalance	2015-05-07 17:07:41 -06:00
cpu-hotplug.txt	cpumask: fix cpu-hotplug documentation	2015-03-05 13:37:01 +10:30
cpu-load.txt
cputopology.txt	Documentation: Update cputopology.txt	2015-05-27 15:22:15 +02:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation updates for 4.2	2015-06-24 20:01:36 -07:00
DMA-API.txt	PCI: Add pci_bus_addr_t	2015-05-29 17:21:45 -05:00
DMA-attributes.txt
dma-buf-sharing.txt	dma-buf: cleanup dma_buf_export() to make it easily extensible	2015-04-21 14:47:16 +05:30
DMA-ISA-LPC.txt
dontdiff
dynamic-debug-howto.txt
edac.txt	EDAC: Update Documentation/edac.txt	2015-06-24 18:17:40 +02:00
efi-stub.txt
eisa.txt
email-clients.txt	Documentation/email-clients.txt: Fix one grammar mistake, add extra info about TB	2015-03-20 07:41:55 -06:00
flexible-arrays.txt
futex-requeue-pi.txt	doc: Fix misnamed FUTEX_CMP_REQUEUE_PI op constants	2015-01-19 12:05:32 +01:00
gcov.txt
gdb-kernel-debugging.txt	scripts/gdb: add basic documentation	2015-02-17 14:34:54 -08:00
highuid.txt
HOWTO	Documentation: remove outdated references to the linux-next wiki	2014-10-28 09:06:11 -04:00
hsi.txt
hw_random.txt
hwspinlock.txt	hwspinlock/core: add device tree support	2015-05-02 09:54:30 +03:00
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	ipmi:ssif: Ignore spaces when comparing I2C adapter names	2015-05-05 14:24:45 -05:00
IRQ-affinity.txt
IRQ-domain.txt	IRQCHIP: Update docs regarding irq_domain_add_tree()	2015-04-01 17:21:35 +02:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kasan.txt	Merge branch 'doc/4.2' into docs-next	2015-06-08 17:04:11 -06:00
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt	Additional ACPICA material for v4.2-rc1	2015-07-02 17:11:28 -07:00
kernel-per-CPU-kthreads.txt	documentation: Update per-CPU kthreads documentation	2015-02-26 11:57:30 -08:00
kmemcheck.txt	Documentation: update the CONFIG_DEBUG_PAGEALLOC description	2015-03-20 07:41:55 -06:00
kmemleak.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
kobject.txt	kobject: grammar fix	2014-12-08 09:07:11 -05:00
kprobes.txt	kprobes: Update Documentation/kprobes.txt	2015-03-20 07:41:55 -06:00
kref.txt
kselftest.txt	kselftest: Move the docs to the Documentation dir	2014-11-24 10:49:54 -07:00
ldm.txt
local_ops.txt	percpu: update local_ops.txt to reflect this_cpu operations	2014-12-13 12:42:53 -08:00
lockup-watchdogs.txt	watchdog: add watchdog_cpumask sysctl to assist nohz	2015-06-24 17:49:40 -07:00
logo.gif
logo.txt
lzo.txt	Documentation: lzo: document part of the encoding	2014-09-28 11:08:00 +02:00
magic-number.txt	Documentation/magic-number: Remove SCC_MAGIC	2015-05-13 15:39:04 -04:00
mailbox.txt	Documentation: Fix a typo in mailbox.txt	2014-11-03 11:54:50 -05:00
Makefile	Documentation: Remove ZBOOT MMC/SDHI utility and docs	2015-02-24 06:45:25 +09:00
ManagementStyle
md-cluster.txt	md-cluster: Design Documentation	2015-02-23 07:16:46 -06:00
md.txt	doc:md: fix typo in md.txt.	2015-06-23 06:49:44 -06:00
media-framework.txt
memory-barriers.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-22 14:54:22 -07:00
memory-hotplug.txt	mem-hotplug: fix typo in Documentation/memory-hotplug.txt	2015-03-20 07:41:55 -06:00
module-signing.txt	modsign: change default key details	2015-04-30 09:35:41 -07:00
mono.txt
nommu-mmap.txt	fs: introduce f_op->mmap_capabilities for nommu mmap support	2015-01-20 14:02:58 -07:00
ntb.txt	NTB: Rename Intel code names to platform names	2015-07-04 14:09:25 -04:00
numastat.txt
oops-tracing.txt	livepatch: kernel: add TAINT_LIVEPATCH	2014-12-22 15:40:48 +01:00
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt	phy: core: Add devm_of_phy_get_by_index to phy-core	2015-05-11 21:42:23 +05:30
pi-futex.txt
pinctrl.txt	pinctrl: move strict option to pinmux_ops	2015-05-06 14:45:19 +02:00
pnp.txt
preempt-locking.txt	x86/fpu: Rename math_state_restore() to fpu__restore()	2015-05-19 15:47:18 +02:00
printk-formats.txt	The documentation tree update for 4.1. Numerous fixes, the overdue removal	2015-04-18 11:10:49 -04:00
pwm.txt
ramoops.txt	pstore-ram: Allow optional mapping with pgprot_noncached	2014-12-11 13:38:31 -08:00
rbtree.txt
remoteproc.txt	remoteproc: introduce rproc_get_by_phandle API	2015-06-16 21:12:52 +03:00
rfkill.txt	rfkill: document rfkill module parameters	2015-01-09 23:22:12 +01:00
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt	Documentation, split up rtc.txt into documentation and test file	2015-03-24 22:01:58 -06:00
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt	stable: Update documentation to clarify preferred procedure	2015-05-22 09:38:56 -06:00
static-keys.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches	SubmittingPatches: Clarify requirements for patches directed toward stable	2015-05-14 15:34:52 -04:00
svga.txt
sysfs-rules.txt
sysrq.txt
this_cpu_ops.txt	Docs: this_cpu_ops: remove redundant add forms	2014-09-26 11:03:00 +02:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt	vfio: powerpc/spapr: Support Dynamic DMA windows	2015-06-11 15:16:55 +10:00
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt	Documentation: mention vme_master_mmap() in VME API	2015-06-12 17:26:56 -07:00
volatile-considered-harmful.txt
workqueue.txt	workqueue: fix trivial typo in Documentation/workqueue.txt	2015-05-05 09:50:38 -04:00
xillybus.txt	xillybus: Move out of staging	2014-09-23 23:44:16 -07:00
xz.txt
zorro.txt