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Johannes Weiner 91b0abe36a mm + fs: store shadow entries in page cache 
Reclaim will be leaving shadow entries in the page cache radix tree upon
evicting the real page.  As those pages are found from the LRU, an
iput() can lead to the inode being freed concurrently.  At this point,
reclaim must no longer install shadow pages because the inode freeing
code needs to ensure the page tree is really empty.

Add an address_space flag, AS_EXITING, that the inode freeing code sets
under the tree lock before doing the final truncate.  Reclaim will check
for this flag before installing shadow pages.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Metin Doslu <metin@citusdata.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ozgun Erdogan <ozgun@citusdata.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-04-03 16:21:01 -07:00
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accessibility
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acpi More ACPI and power management updates for 3.15-rc1 2014-04-02 14:10:21 -07:00
amba
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ata Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
atm atm: idt77105: Use del_timer_sync() in exit path 2014-03-25 21:06:02 -04:00
auxdisplay
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base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
bcma bcma: gpio: register 32 GPIOs on BCM5357 2014-03-27 14:20:04 -04:00
block Nothing exciting: virtio-blk users might see a bit of a boost from the 2014-04-02 14:43:17 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-04-02 20:53:45 -07:00
bus
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cdrom
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char Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
clk
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clocksource Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 13:15:58 -07:00
connector Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-04-02 20:53:45 -07:00
cpufreq More ACPI and power management updates for 3.15-rc1 2014-04-02 14:10:21 -07:00
cpuidle Merge branch 'sched-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 16:22:27 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
dca
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devfreq PM / devfreq: Rewrite devfreq_update_status() to fix multiple bugs 2014-03-21 11:16:30 +09:00
dio
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dma
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edac Merge branch 'mips-for-linux-next' of git://git.linux-mips.org/pub/scm/ralf/upstream-sfr 2014-04-02 13:40:50 -07:00
eisa
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extcon extcon: Move OF helper function to extcon core and change function name 2014-03-19 14:41:58 +09:00
firewire
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firmware Driver core / sysfs patches for 3.15-rc1 2014-04-01 16:28:19 -07:00
fmc
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gpio MIPS: VR41xx: Mark GPIO lines used for IRQ 2014-03-31 18:17:12 +02:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-04-02 16:24:28 -07:00
hsi
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hv Char/Misc driver patches for 3.15-rc1 2014-04-01 16:13:21 -07:00
hwmon Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-04-02 13:42:59 -07:00
hwspinlock
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i2c i2c: cpm: Fix build by adding of_address.h and of_irq.h 2014-03-24 14:54:21 +01:00
ide
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idle
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iio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-04-02 16:24:28 -07:00
infiniband RDMA/cxgb4: set error code on kmalloc() failure 2014-03-28 14:55:21 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
iommu Merge branch 'for-3.15' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2014-04-02 14:34:25 -07:00
ipack
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irqchip irqchip: sun7i/sun6i: Disable NMI before registering the handler 2014-03-31 11:12:57 +02:00
isdn net: isdn: use sk_unattached_filter api 2014-03-31 00:45:09 -04:00
leds
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lguest
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macintosh
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mailbox
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mcb
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md Merge branch 'for-3.15/drivers' of git://git.kernel.dk/linux-block 2014-04-01 19:43:53 -07:00
media Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 12:51:41 -07:00
memory
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memstick
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message PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
mfd regulator: Updates for v3.15 2014-04-01 13:17:46 -07:00
misc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
mmc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
mtd Char/Misc driver patches for 3.15-rc1 2014-04-01 16:13:21 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-04-02 20:53:45 -07:00
nfc
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ntb
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nubus
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of Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-04-02 20:53:45 -07:00
oprofile
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parisc
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parport
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pci Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 13:15:58 -07:00
pcmcia PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
phy
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pinctrl Pin control bulk changes for the v3.15 series, no new core 2014-04-01 13:10:49 -07:00
platform sound updates for 3.15-rc1 2014-04-01 15:38:47 -07:00
pnp More ACPI and power management updates for 3.15-rc1 2014-04-02 14:10:21 -07:00
power
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powercap
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pps
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ps3
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ptp net: ptp: move PTP classifier in its own file 2014-04-01 16:43:18 -04:00
pwm
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rapidio
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regulator Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
remoteproc
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reset
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rpmsg
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rtc
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s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-04-02 20:53:45 -07:00
sbus
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scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
sfi
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sh
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sn
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spi Merge branch 'mips-for-linux-next' of git://git.linux-mips.org/pub/scm/ralf/upstream-sfr 2014-04-02 13:40:50 -07:00
spmi
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ssb
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staging mm + fs: store shadow entries in page cache 2014-04-03 16:21:01 -07:00
target
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tc
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thermal
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tty TTY/Serial driver update for 3.15-rc1 2014-04-01 16:55:57 -07:00
uio
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usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-04-02 16:23:38 -07:00
uwb
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vfio PCI changes for the v3.15 merge window: 2014-04-01 15:14:04 -07:00
vhost vhost: validate vhost_get_vq_desc return value 2014-03-28 16:10:35 -04:00
video Merge branch 'x86-nuke-platforms-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-04-02 13:15:58 -07:00
virt
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virtio
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vlynq
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vme
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w1
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watchdog Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-04-02 13:42:59 -07:00
xen ACPI and power management updates for 3.15-rc1 2014-04-01 12:48:54 -07:00
zorro
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Kconfig
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Makefile
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