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12124bea5b
linux/drivers
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Chris Wilson 12124bea5b drm/i915: Suppress switch_mm emission between the same aliasing_ppgtt 
When switching between contexts using the aliasing_ppgtt, the VM is
shared. We don't need to reload the PD registers unless they are dirty.

Martin Peres reported an issue that looks like corruption between
Haswell context switches, bisecting to commit f9326be5f1 ("drm/i915:
Rearrange switch_context to load the aliasing ppgtt on first use").
Switching between the same mm (the aliasing_ppgtt is used for all
contexts in this case) should be a nop, but appears to trigger some
side-effects in the context switch. However, as we know the switch
is redundant in this case, we can skip it and continue to ignore the
issue until somebody feels strong enough to investigate full-ppgtt on
gen7 again!

Except.. Martin was using full-ppgtt which is not supported as it
doesn't work correctly yet. So whilst the bisect did yield valuable
information about the failures, the fix should not have any user impact
under default settings, with the exception of a slightly lower
throughput on xcs as the VM would always be reloaded.

v2: Also remember to set the legacy_active_context following the switch
on xcs (commit e8a9c58fcd ("drm/i915: Unify active context tracking
between legacy/execlists/guc"))

Fixes: f9326be5f1 ("drm/i915: Rearrange switch_context to load the aliasing ppgtt on first use")
Fixes: e8a9c58fcd ("drm/i915: Unify active context tracking between legacy/execlists/guc")
Reported-by: Martin Peres <martin.peres@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Martin Peres <martin.peres@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170812152724.6883-1-chris@chris-wilson.co.uk
2017-08-12 16:50:12 +01:00
..
accessibility
acpi acpi/nfit: Fix memory corruption/Unregister mce decoder on failure 2017-07-17 11:43:58 -07:00
amba
android binder: Use wake up hint for synchronous transactions. 2017-07-17 14:44:19 +02:00
ata Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-07-06 09:41:58 -07:00
atm atm: zatm: Fix an error handling path in 'zatm_init_one()' 2017-07-18 11:37:46 -07:00
auxdisplay
base Power management fixes for v4.13-rc2 2017-07-20 14:56:46 -07:00
bcma
block nbd: kill unused ret in recv_work 2017-07-13 08:03:30 -06:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
bus main drm pull for v4.13 2017-07-09 18:48:37 -07:00
cdrom block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
char agp: nvidia: constify pci_device_id. 2017-08-04 16:59:50 +10:00
clk Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-07-15 10:59:54 -07:00
clocksource clocksource/drivers/timer-of: Handle of_irq_get_byname() result correctly 2017-07-17 22:43:00 +02:00
connector
cpufreq Merge branches 'intel_pstate' and 'pm-domains' 2017-07-20 18:57:15 +02:00
cpuidle powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-07-14 22:49:50 -07:00
dax device-dax: fix sysfs duplicate warnings 2017-07-18 17:49:14 -07:00
dca
devfreq PM / devfreq: constify attribute_group structures. 2017-07-06 10:17:24 +09:00
dio
dma dmaengine updates for 4.13-rc1 2017-07-08 12:36:50 -07:00
dma-buf dma-buf/sw_sync: clean up list before signaling the fence 2017-07-31 14:11:15 -03:00
edac EDAC, pnd2: Fix Apollo Lake DIMM detection 2017-06-29 10:37:50 +02:00
eisa
extcon
firewire networking: make skb_push & __skb_push return void pointers 2017-06-16 11:48:40 -04:00
firmware efi: avoid fortify checks in EFI stub 2017-07-12 16:26:02 -07:00
fmc
fpga
fsi drivers/fsi: fix fsi_slave_mode prototype 2017-07-17 16:13:54 +02:00
gpio Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
gpu drm/i915: Suppress switch_mm emission between the same aliasing_ppgtt 2017-08-12 16:50:12 +01:00
hid HID: hid-logitech-hidpp: add NULL check on devm_kmemdup() return value 2017-07-20 15:45:39 +02:00
hsi HSI changes for the v4.13 series 2017-07-04 14:28:22 -07:00
hv vmbus: re-enable channel tasklet 2017-07-17 15:00:47 +02:00
hwmon hwmon: (applesmc) Avoid buffer overruns 2017-07-15 16:38:56 -07:00
hwspinlock
hwtracing Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
i2c Merge branch 'i2c/for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-07-12 10:04:56 -07:00
ide ide: avoid warning for timings calculation 2017-07-21 04:37:22 +01:00
idle intel_idle: Use more common logging style 2017-06-29 22:58:35 +02:00
iio hwmon updates for v4.13: 2017-07-04 11:48:27 -07:00
infiniband RDMA/core: Initialize port_num in qp_attr 2017-07-20 11:24:13 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-07-14 22:53:37 -07:00
iommu IOMMU Updates for Linux v4.13 2017-07-12 10:00:04 -07:00
ipack
irqchip irqchip/digicolor: Drop unnecessary static 2017-07-18 21:59:23 +02:00
isdn isdn: avm: c4: constify pci_device_id. 2017-07-15 21:25:56 -07:00
leds LED updates for 4.13 2017-07-06 11:32:40 -07:00
lguest
lightnvm lightnvm: pblk: remove unnecessary checks 2017-07-07 13:17:36 -06:00
macintosh Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 13:13:32 -07:00
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2017-07-07 10:24:07 -07:00
mcb
md Merge tag 'md/4.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-07-18 11:51:08 -07:00
media drm: rcar-du: Repair vblank for DRM page flips using the VSP 2017-08-03 16:17:30 +03:00
memory ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
memstick
message
mfd chrome-platform-for-linus-4.13 2017-07-11 09:55:47 -07:00
misc powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
mmc MMC core: 2017-07-14 13:10:06 -07:00
mtd MTD updates for v4.13-rc1: 2017-07-13 12:07:44 -07:00
mux mux: mux-core: unregister mux_class in mux_exit() 2017-07-17 16:38:35 +02:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-07-20 16:33:39 -07:00
nfc NFC 4.13 pull request 2017-07-01 14:30:39 -07:00
ntb ntb: Add error path/handling to Debug FS entry creation 2017-07-06 11:30:08 -04:00
nubus
nvdimm libnvdimm: fix badblock range handling of ARS range 2017-07-17 11:43:58 -07:00
nvme nvmet: don't report 0-bytes in serial number 2017-07-20 08:41:56 -06:00
nvmem nvmem: rockchip-efuse: amend compatible rk322x-efuse to rk3228-efuse 2017-07-17 16:15:57 +02:00
of Device properties framework updates for v4.13-rc1 2017-07-10 15:23:45 -07:00
oprofile
parisc parisc: ->mapping_error 2017-07-05 21:46:42 +02:00
parport
pci Power management fixes for v4.13-rc1 2017-07-14 22:24:25 -07:00
pcmcia
perf Merge branch 'aarch64/for-next/ras-apei' into aarch64/for-next/core 2017-06-26 10:54:27 +01:00
phy
pinctrl This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
platform Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2017-07-15 10:59:54 -07:00
pnp This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
power power supply and reset changes for the v4.13 series (part 2) 2017-07-13 11:47:59 -07:00
powercap powercap/RAPL: prevent overridding bits outside of the mask 2017-06-28 00:38:34 +02:00
pps
ps3
ptp ptp: dte: Use LL suffix for 64-bit constants 2017-07-06 11:40:58 +01:00
pwm pwm: Changes for v4.13-rc1 2017-07-13 11:49:52 -07:00
rapidio
ras arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
regulator Merge remote-tracking branches 'regulator/topic/settle', 'regulator/topic/tps65910' and 'regulator/topic/tps65917' into regulator-next 2017-07-03 16:52:21 +01:00
remoteproc remoteproc/keystone: Fix circular dependencies for ARM configs 2017-06-27 16:21:34 -07:00
reset ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
rpmsg rpmsg updates for v4.13 2017-07-06 15:38:31 -07:00
rtc RTC for 4.13 2017-07-13 12:15:06 -07:00
s390 drivers: s390: move static and inline before return type 2017-07-12 16:26:04 -07:00
sbus block: don't set bounce limit in blk_init_queue 2017-06-27 12:13:45 -06:00
scsi SCSI fixes on 20170715 2017-07-17 12:26:12 -07:00
sfi
sh drivers/sh/intc/virq.c: delete an error message for a failed memory allocation in add_virq_to_pirq() 2017-07-06 16:24:30 -07:00
sn
soc ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
spi Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-08 10:41:53 -07:00
spmi spmi: pmic-arb: Always allocate ppid_to_apid table 2017-07-17 15:00:47 +02:00
ssb
staging staging: vboxvideo: remove dead gamma lut code 2017-08-07 11:20:36 +02:00
target Add wait_for_random_bytes() and get_random_*_wait() functions so that 2017-07-15 12:44:02 -07:00
tc
tee
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2017-07-14 13:12:32 -07:00
thunderbolt thunderbolt: Correct access permissions for active NVM contents 2017-07-17 15:55:08 +02:00
tty tty: hide unused pty_get_peer function 2017-07-17 17:04:41 +02:00
uio
usb xhci: fix memleak in xhci_run() 2017-07-20 14:40:36 +02:00
uwb driver core patches for 4.13-rc1 2017-07-03 20:27:48 -07:00
vfio VFIO updates for v4.13-rc1 2017-07-13 12:23:54 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2017-07-13 14:27:32 -07:00
video Merge branch 'akpm' (patches from Andrew) 2017-07-13 12:38:49 -07:00
virt
virtio virtio_balloon: disable VIOMMU support 2017-06-18 23:13:35 +03:00
vlynq
vme
w1 w1: omap-hdq: fix error return code in omap_hdq_probe() 2017-07-17 16:48:15 +02:00
watchdog Merge git://www.linux-watchdog.org/linux-watchdog 2017-07-11 09:59:37 -07:00
xen xen/balloon: don't online new memory initially 2017-07-23 08:13:18 +02:00
zorro
Kconfig
Makefile