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| author | Igor Mammedov <imammedo@redhat.com> | 2015-03-20 12:21:37 +0000 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2015-04-27 19:59:55 +0200 |
| commit | 0f497be83e7e0496e39e4d8bf3fc8315d0b960d2 (patch) | |
| tree | bd7bc6ecc592619180ee51ec37b58e0e94e1eeab /Kconfig | |
| parent | 4b68cd72580b97730a1676c98217077b98c33f08 (diff) | |
| download | lwn-0f497be83e7e0496e39e4d8bf3fc8315d0b960d2.tar.gz lwn-0f497be83e7e0496e39e4d8bf3fc8315d0b960d2.zip | |
kvm: avoid page allocation failure in kvm_set_memory_region()
commit 744961341d472db6272ed9b42319a90f5a2aa7c4 upstream.
KVM guest can fail to startup with following trace on host:
qemu-system-x86: page allocation failure: order:4, mode:0x40d0
Call Trace:
dump_stack+0x47/0x67
warn_alloc_failed+0xee/0x150
__alloc_pages_direct_compact+0x14a/0x150
__alloc_pages_nodemask+0x776/0xb80
alloc_kmem_pages+0x3a/0x110
kmalloc_order+0x13/0x50
kmemdup+0x1b/0x40
__kvm_set_memory_region+0x24a/0x9f0 [kvm]
kvm_set_ioapic+0x130/0x130 [kvm]
kvm_set_memory_region+0x21/0x40 [kvm]
kvm_vm_ioctl+0x43f/0x750 [kvm]
Failure happens when attempting to allocate pages for
'struct kvm_memslots', however it doesn't have to be
present in physically contiguous (kmalloc-ed) address
space, change allocation to kvm_kvzalloc() so that
it will be vmalloc-ed when its size is more then a page.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions