Chris Wilson d25f71a162 drm/i915: Return immediately if trylock fails for direct-reclaim ... Ignore trying to shrink from i915 if we fail to acquire the struct_mutex in the shrinker while performing direct-reclaim. The trade-off being (much) lower latency for non-i915 clients at an increased risk of being unable to obtain a page from direct-reclaim without hitting the oom-notifier. The proviso being that we still keep trying to hard obtain the lock for kswapd so that we can reap under heavy memory pressure. v2: Taint all mutexes taken within the shrinker with the struct_mutex subclass as an early warning system, and drop I915_SHRINK_ACTIVE from vmap to reduce the number of dangerous paths. We also have to drop I915_SHRINK_ACTIVE from oom-notifier to be able to make the same claim that ACTIVE is only used from outside context, which fits in with a longer strategy of avoiding stalls due to scanning active during shrinking. The danger in using the subclass struct_mutex is that we declare ourselves more knowledgable than lockdep and deprive ourselves of automatic coverage. Instead, we require ourselves to mark up any mutex taken inside the shrinker in order to detect lock-inversion, and if we miss any we are doomed to a deadlock at the worst possible moment. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190107115509.12523-1-chris@chris-wilson.co.uk		2019-01-08 09:28:18 +00:00
..
accessibility	…
acpi	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
amba	…
android	binder: implement binderfs	2018-12-19 09:40:13 +01:00
ata	for-4.21/libata-20190102	2019-01-02 18:47:56 -08:00
atm	…
auxdisplay	auxdisplay: charlcd: fix x/y command parsing	2018-12-21 21:27:21 +01:00
base	Merge branch 'mount.part1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-01-05 13:25:58 -08:00
bcma	…
block	block: sunvdc: don't run hw queue synchronously from irq context	2019-01-03 08:21:47 -07:00
bluetooth	Bluetooth: hci_bcm: Handle specific unknown packets after firmware loading	2018-12-19 13:43:42 +01:00
bus	ARM: SoC driver updates	2018-12-31 17:32:35 -08:00
cdrom	gdrom: fix a memory leak bug	2018-12-29 08:20:44 -07:00
char	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
clk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-01-02 18:56:59 -08:00
clocksource	arch/csky patches for 4.21-rc1	2019-01-05 09:50:07 -08:00
connector	…
cpufreq	powerpc updates for 4.21	2018-12-27 10:43:24 -08:00
cpuidle	powerpc updates for 4.21	2018-12-27 10:43:24 -08:00
crypto	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
dax	mm, devm_memremap_pages: fix shutdown handling	2018-12-28 12:11:47 -08:00
dca	…
devfreq	…
dio	…
dma	Merge branch 'next/drivers' into next/late	2019-01-04 14:31:38 -08:00
dma-buf	drivers/dma-buf/udmabuf.c: convert to use vm_fault_t	2019-01-04 13:13:46 -08:00
edac	EDAC, fsl_ddr: Add LS1021A to the list of supported hardware	2018-12-19 11:57:45 +01:00
eisa	…
extcon	…
firewire	FireWire (IEEE 1394) subsystem patch:	2019-01-05 18:33:21 -08:00
firmware	arm64 fixes for -rc1	2019-01-05 11:28:39 -08:00
fmc	…
fpga	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
fsi	…
gnss	…
gpio	This is the bulk of GPIO changes for the v4.21 kernel series:	2018-12-28 20:00:21 -08:00
gpu	drm/i915: Return immediately if trylock fails for direct-reclaim	2019-01-08 09:28:18 +00:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2019-01-05 17:53:40 -08:00
hsi	…
hv	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
hwmon	Kconfig updates for v4.21	2018-12-29 13:03:29 -08:00
hwspinlock	hwspinlock: fix return value check in stm32_hwspinlock_probe()	2019-01-03 11:42:10 -08:00
hwtracing	intel_th: msu: Fix an off-by-one in attribute store	2018-12-19 20:21:06 +01:00
i2c	Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-01-05 18:13:35 -08:00
i3c	…
ide	for-4.21/block-20181221	2018-12-28 13:19:59 -08:00
idle	…
iio	Staging/IIO driver patches for 4.21-rc1	2018-12-28 20:39:58 -08:00
infiniband	4.21 merge window 2nd pull request	2019-01-05 18:20:51 -08:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-01-02 18:56:59 -08:00
iommu	IOMMU Updates for Linux v4.21	2019-01-01 15:55:29 -08:00
ipack	…
irqchip	Xtensa updates for v4.21:	2018-12-29 09:40:40 -08:00
isdn	isdn: fix kernel-infoleak in capi_unlocked_ioctl	2019-01-02 10:31:39 -08:00
leds	LEDs for 4.21-rc1	2018-12-25 14:52:50 -08:00
lightnvm	lightnvm: pblk: fix use-after-free bug	2018-12-22 14:45:35 -07:00
macintosh	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
mailbox	mailbox: tegra-hsp: Use device-managed registration API	2018-12-21 22:31:26 -06:00
mcb	…
md	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md into for-linus	2019-01-03 08:21:02 -07:00
media	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
memory	ARM: SoC: late updates	2019-01-05 11:30:37 -08:00
memstick	MMC core:	2018-12-28 16:52:18 -08:00
message	scsi: flip the default on use_clustering	2018-12-18 23:13:12 -05:00
mfd	…
misc	Merge branch 'i2c/for-5.0' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-01-05 18:13:35 -08:00
mmc	MMC core:	2018-12-28 16:52:18 -08:00
mtd	Kbuild updates for v4.21	2018-12-29 12:03:17 -08:00
mux	…
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-01-03 12:53:47 -08:00
nfc	…
ntb	…
nubus	…
nvdimm	Merge branch 'akpm' (patches from Andrew)	2018-12-28 16:55:46 -08:00
nvme	nvme-pci: trace SQ status on completions	2018-12-19 08:35:36 +01:00
nvmem	…
of	Merge tag 'devicetree-for-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux	2018-12-28 20:08:34 -08:00
opp	…
oprofile	…
parisc	Kconfig file consolidation for v4.21	2018-12-29 13:40:29 -08:00
parport	…
pci	pci-v4.21-changes	2019-01-05 17:57:34 -08:00
pcmcia	Included in this update:	2019-01-05 11:23:17 -08:00
perf	drivers/perf: hisi: Fixup one DDRC PMU register offset	2019-01-04 10:13:27 +00:00
phy	…
pinctrl	Pin control bulk changes for the v4.21 kernel cycle:	2019-01-01 13:19:16 -08:00
platform	chrome platform changes for v4.21	2019-01-06 11:40:06 -08:00
pnp	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
power	power supply and reset changes for the v4.21 series	2018-12-28 20:22:45 -08:00
powercap	…
pps	Kconfig updates for v4.21	2018-12-29 13:03:29 -08:00
ps3	…
ptp	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
pwm	pwm: imx: Add ipg clock operation	2018-12-24 12:06:56 +01:00
rapidio	…
ras	treewide: surround Kconfig file paths with double quotes	2018-12-22 00:25:54 +09:00
regulator	Merge remote-tracking branch 'regulator/topic/coupled' into regulator-next	2018-12-21 13:43:35 +00:00
remoteproc	…
reset	…
rpmsg	…
rtc	RTC for 4.21	2019-01-01 13:24:31 -08:00
s390	s390 updates for the 4.21 merge window	2019-01-02 18:37:01 -08:00
sbus	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next	2018-12-26 10:32:18 -08:00
scsi	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
sfi	…
sh	…
siox	…
slimbus	…
sn	…
soc	ARM: SoC driver updates	2018-12-31 17:32:35 -08:00
soundwire	…
spi	spi: Updates for v4.21	2018-12-25 14:43:54 -08:00
spmi	…
ssb	…
staging	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
target	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
tc	…
tee	OP-TEE dynamic shm log message	2018-12-31 13:06:30 -08:00
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2019-01-05 16:07:28 -08:00
thunderbolt	…
tty	ARM: SoC: late updates	2019-01-05 11:30:37 -08:00
uio	Char/Misc driver patches for 4.21-rc1	2018-12-28 20:54:57 -08:00
usb	pci-v4.21-changes	2019-01-05 17:57:34 -08:00
uwb	…
vfio	IOMMU Updates for Linux v4.21	2019-01-01 15:55:29 -08:00
vhost	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
video	fbdev changes for v4.21:	2019-01-05 18:15:37 -08:00
virt	…
virtio	virtio, vhost: features, fixes, cleanups	2019-01-02 18:54:45 -08:00
visorbus	…
vlynq	…
vme	…
w1	treewide: surround Kconfig file paths with double quotes	2018-12-22 00:25:54 +09:00
watchdog	linux-watchdog 4.21-rc1 tag	2019-01-01 13:16:45 -08:00
xen	Remove 'type' argument from access_ok() function	2019-01-03 18:57:57 -08:00
zorro	…
Kconfig	Kconfig file consolidation for v4.21	2018-12-29 13:40:29 -08:00
Makefile	…