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

..

boot

x86, efi stub: Add .reloc section back into image

2012-06-07 09:52:33 -07:00

configs

x86/kconfig: Remove CONFIG_TR=y from the defconfigs

2012-03-24 08:18:03 +01:00

crypto

crypto: aesni-intel - fix unaligned cbc decrypt for x86-32

2012-05-31 20:53:22 +10:00

ia32

x86, compat: Use test_thread_flag(TIF_IA32) in compat signal delivery

2012-06-14 18:16:04 -07:00

include/asm

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-06-29 10:29:54 -07:00

kernel

Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux

2012-06-30 11:11:58 -07:00

kvm

KVM: MMU: fix shrinking page from the empty mmu

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

lguest

lguest: Make sure interrupt is allocated ok by lguest_setup_irq

2012-01-12 15:44:47 +10:30

lib

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-06-29 10:29:54 -07:00

math-emu

x86: Rename trap_no to trap_nr in thread_struct

2012-03-13 06:24:09 +01:00

mm

x86/mm: Fix some kernel-doc warnings

2012-06-11 10:54:45 +02:00

net

bpf jit: Let the x86 jit handle negative offsets

2012-04-03 18:01:41 -04:00

oprofile

x86: Factor out TIF_IA32 from 32-bit address space

2012-02-20 12:48:46 -08:00

pci

Features:

2012-05-24 16:02:08 -07:00

platform

kmsg - kmsg_dump() use iterator to receive log buffer content

2012-06-15 14:53:59 -07:00

power

x86, kvm: Call restore_sched_clock_state() only after %gs is initialized

2012-04-02 13:53:00 +02:00

realmode

x86, realmode: Move end signature into header.S

2012-05-21 00:02:45 -07:00

syscalls

syscalls, x86: add __NR_kcmp syscall

2012-05-31 17:49:32 -07:00

tools

x86/decoder: Fix bsr/bsf/jmpe decoding with operand-size prefix

2012-06-06 08:54:18 +02:00

um

x86, um: Correct syscall table type attributes breaking gcc 4.8

2012-06-09 12:51:09 -07:00

vdso

Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-03-29 18:12:23 -07:00

video

x86: Use vga_default_device() when determining whether an fb is primary

2012-04-24 09:50:17 +01:00

xen

Five bug-fixes:

2012-06-15 17:17:15 -07:00

.gitignore

x86/kprobes: Add arch/x86/tools/insn_sanity to .gitignore

2012-01-16 08:21:59 +01:00

Kbuild

x86, realmode: realmode.bin infrastructure

2012-05-08 11:41:48 -07:00

Kconfig

x86, efi: Add EFI boot stub documentation

2012-06-01 09:11:41 -07:00

Kconfig.cpu

x86: Tighten dependencies of CPU_SUP_*_32

2012-03-08 10:57:34 +01:00

Kconfig.debug

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-01-11 19:13:40 -08:00

Makefile

md updates for 3.5

2012-05-23 17:08:40 -07:00

Makefile_32.cpu

x86, cpu: Move AMD Elan Kconfig under "Processor family"

2011-04-08 13:01:25 -07:00

Makefile.um

um: fix linker script generation

2012-04-09 13:59:00 -04:00