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| author | Gleb Natapov <gleb@redhat.com> | 2010-10-18 15:22:23 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:23:08 +0200 |
| commit | 49c7754ce57063b819b01eb8a4290841ad0886c4 (patch) | |
| tree | 67561bbc829d93efa5316c246ec84fe2f2493236 /arch | |
| parent | 56028d0861e48f7cc9c573d79f2d8a0a933a2bba (diff) | |
| download | linux-49c7754ce57063b819b01eb8a4290841ad0886c4.tar.gz linux-49c7754ce57063b819b01eb8a4290841ad0886c4.tar.bz2 linux-49c7754ce57063b819b01eb8a4290841ad0886c4.zip | |
KVM: Add memory slot versioning and use it to provide fast guest write interface
Keep track of memslots changes by keeping generation number in memslots
structure. Provide kvm_write_guest_cached() function that skips
gfn_to_hva() translation if memslots was not changed since previous
invocation.
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 71beb27597fd..bd254779d1cc 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3190,6 +3190,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, } memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); slots->memslots[log->slot].dirty_bitmap = dirty_bitmap; + slots->generation++; old_slots = kvm->memslots; rcu_assign_pointer(kvm->memslots, slots); |