Mikulas Patocka aeb2deae26 dm crypt: fix mempool deadlock ... This patch fixes a possible deadlock in dm-crypt's mempool use. Currently, dm-crypt reserves a mempool of MIN_BIO_PAGES reserved pages. It allocates first MIN_BIO_PAGES with non-failing allocation (the allocation cannot fail and waits until the mempool is refilled). Further pages are allocated with different gfp flags that allow failing. Because allocations may be done in parallel, this code can deadlock. Example: There are two processes, each tries to allocate MIN_BIO_PAGES and the processes run simultaneously. It may end up in a situation where each process allocates (MIN_BIO_PAGES / 2) pages. The mempool is exhausted. Each process waits for more pages to be freed to the mempool, which never happens. To avoid this deadlock scenario, this patch changes the code so that only the first page is allocated with non-failing gfp mask. Allocation of further pages may fail. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@kernel.org Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>		2012-03-28 18:41:22 +01:00
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accessibility
acpi
amba
ata	1) AHCI regression fix. A recent "make driver conform to spec" change	2012-03-22 20:22:30 -07:00
atm	eni: fix driver remove function and driver probe error path.	2012-03-16 23:13:20 -07:00
auxdisplay
base	Things are really quieting down with the regmap API, while we're still	2012-03-22 20:33:14 -07:00
bcma
block	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-03-21 18:55:10 -07:00
bluetooth
cdrom	powerpc: Remove some of the legacy iSeries specific device drivers	2012-03-16 09:28:05 +11:00
char	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2012-03-22 13:08:22 -07:00
clk
clocksource	Power management updates for 3.4	2012-03-21 10:15:51 -07:00
connector
cpufreq
cpuidle
crypto	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2012-03-22 18:15:32 -07:00
dca
devfreq	PM / devfreq: add relation of recommended frequency.	2012-03-17 21:51:34 +01:00
dio
dma	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-03-20 21:12:50 -07:00
edac	edac: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:17 +08:00
eisa
firewire	IEEE 1394 (FireWire) subsystem updates post v3.3:	2012-03-22 20:31:15 -07:00
firmware
gpio	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-03-21 18:55:10 -07:00
gpu	Merge branch 'drm-nouveau-destage' of git://people.freedesktop.org/~airlied/linux	2012-03-22 13:27:02 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2012-03-22 20:20:18 -07:00
hv	Tools: hv: Support enumeration from all the pools	2012-03-16 13:36:04 -07:00
hwmon	hwmon changes for v3.4	2012-03-21 10:37:25 -07:00
hwspinlock
i2c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2012-03-22 13:08:22 -07:00
ide	ide: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:17 +08:00
idle	drivers/idle/intel_idle.c: fix confusing code identation	2012-03-21 17:54:54 -07:00
ieee802154
infiniband	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2012-03-22 12:38:04 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2012-03-22 20:20:18 -07:00
iommu	Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-22 09:30:39 -07:00
isdn	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2012-03-20 21:04:47 -07:00
leds	Linux 3.3-rc7	2012-03-14 09:48:16 +01:00
lguest
macintosh	Core device tree changes for Linux v3.4	2012-03-21 10:30:03 -07:00
mca
md	dm crypt: fix mempool deadlock	2012-03-28 18:41:22 +01:00
media	Merge branch 'kmap_atomic' of git://github.com/congwang/linux	2012-03-21 09:40:26 -07:00
memstick	memstick: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:19 +08:00
message
mfd	Things are really quieting down with the regmap API, while we're still	2012-03-22 20:33:14 -07:00
misc	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-03-21 18:55:10 -07:00
mmc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-03-21 13:36:41 -07:00
mtd	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-03-21 18:55:10 -07:00
net	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-03-21 13:36:41 -07:00
nfc
nubus
of	Core device tree changes for Linux v3.4	2012-03-21 10:30:03 -07:00
oprofile	tidy up after d_make_root() conversion	2012-03-20 21:29:37 -04:00
parisc
parport
pci	Features:	2012-03-22 20:16:14 -07:00
pcmcia
pinctrl	pinctrl: support pinconfig on the U300	2012-03-12 22:49:03 +01:00
platform	Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-22 09:43:22 -07:00
pnp
power	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2012-03-20 21:12:50 -07:00
pps
ps3
ptp	phc: Update author's email address.	2012-03-17 01:41:43 -07:00
rapidio	rapidio/tsi721: fix bug in register offset definitions	2012-03-15 17:03:03 -07:00
regulator	regulator: Updates for 3.4	2012-03-21 10:34:56 -07:00
rtc	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-20 10:32:09 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2012-03-22 18:15:32 -07:00
sbus
scsi	SCSI updates on 20120319	2012-03-22 12:55:29 -07:00
sfi
sh
sn
spi	SPI changes for v3.4.	2012-03-21 10:32:00 -07:00
ssb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2012-03-20 21:04:47 -07:00
staging	Cleanups: rename of flush to invalidate, moving reporting of statistics	2012-03-22 19:52:47 -07:00
target	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2012-03-22 12:38:04 -07:00
tc
thermal
tty	Pinctrl updates for v3.4:	2012-03-22 20:25:50 -07:00
uio
usb	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-03-21 13:36:41 -07:00
uwb
vhost	vhost: remove the second argument of k[un]map_atomic()	2012-03-20 21:48:21 +08:00
video	fbdev updates for 3.4	2012-03-22 20:43:40 -07:00
virt
virtio
vlynq
w1
watchdog	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2012-03-21 18:55:10 -07:00
xen	Features:	2012-03-22 20:16:14 -07:00
zorro
Kconfig
Makefile