Xiao Guangrong 85b7059169 KVM: MMU: fix shrinking page from the empty mmu ...

Fix:

 [ 3190.059226] BUG: unable to handle kernel NULL pointer dereference at           (null)
 [ 3190.062224] IP: [<ffffffffa02aac66>] mmu_page_zap_pte+0x10/0xa7 [kvm]
 [ 3190.063760] PGD 104f50067 PUD 112bea067 PMD 0
 [ 3190.065309] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
 [ 3190.066860] CPU 1
[ ...... ]
 [ 3190.109629] Call Trace:
 [ 3190.111342]  [<ffffffffa02aada6>] kvm_mmu_prepare_zap_page+0xa9/0x1fc [kvm]
 [ 3190.113091]  [<ffffffffa02ab2f5>] mmu_shrink+0x11f/0x1f3 [kvm]
 [ 3190.114844]  [<ffffffffa02ab25d>] ? mmu_shrink+0x87/0x1f3 [kvm]
 [ 3190.116598]  [<ffffffff81150c9d>] ? prune_super+0x142/0x154
 [ 3190.118333]  [<ffffffff8110a4f4>] ? shrink_slab+0x39/0x31e
 [ 3190.120043]  [<ffffffff8110a687>] shrink_slab+0x1cc/0x31e
 [ 3190.121718]  [<ffffffff8110ca1d>] do_try_to_free_pages

This is caused by shrinking page from the empty mmu, although we have
checked n_used_mmu_pages, it is useless since the check is out of mmu-lock

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

2012-07-03 17:31:50 -03:00

..

alpha

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

arm

Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

2012-07-01 11:02:25 -07:00

avr32

fixups for signal breakage

2012-06-04 17:47:34 -04:00

blackfin

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-06-05 09:47:15 -07:00

c6x

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

cris

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

frv

frv: Remove bogus closing parenthesis

2012-06-02 10:38:19 -04:00

h8300

h8300: use the declarations provided by <asm/sections.h>

2012-06-20 14:39:35 -07:00

hexagon

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

ia64

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

m32r

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

m68k

m68knommu: define a local devm_clk_get() function

2012-06-25 09:17:20 +10:00

microblaze

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

mips

- More robust parsing especially of xattr data in JFFS2

2012-06-01 16:55:42 -07:00

mn10300

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

openrisc

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

parisc

[PARISC] fix code to find libgcc

2012-06-05 14:10:23 +09:00

powerpc

powerpc/pseries: Fix software invalidate TCE

2012-06-29 14:35:37 +10:00

s390

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

2012-06-01 11:53:44 -07:00

score

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

sh

Merge branches 'sh/urgent' and 'sh/trivial' into sh-fixes-for-linus

2012-06-28 16:46:13 +09:00

sparc

Fix typo in printed messages

2012-06-24 11:03:52 -07:00

tile

tile: fix bug in get_user() for 4-byte values

2012-06-16 16:56:13 -04:00

um

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

unicore32

new helper: signal_delivered()

2012-06-01 12:58:52 -04:00

x86

KVM: MMU: fix shrinking page from the empty mmu

2012-07-03 17:31:50 -03:00

xtensa

xtensa: use the declarations provided by <asm/sections.h>

2012-06-20 14:39:35 -07:00

.gitignore

…

Kconfig

Merge branch 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping

2012-05-25 09:18:59 -07:00