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| author | Avi Kivity <avi@qumranet.com> | 2007-01-05 16:36:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2007-01-05 23:55:26 -0800 |
| commit | 86a5ba025d0a0b251817d0efbeaf7037d4175d21 (patch) | |
| tree | 35dbc71edaa0d242ba4c0ca429c41cff67df38d0 /drivers/kvm/kvm.h | |
| parent | 139bdb2d9e410d448281057a37b53770324ccac8 (diff) | |
| download | op-kernel-dev-86a5ba025d0a0b251817d0efbeaf7037d4175d21.zip op-kernel-dev-86a5ba025d0a0b251817d0efbeaf7037d4175d21.tar.gz | |
[PATCH] KVM: MMU: Page table write flood protection
In fork() (or when we protect a page that is no longer a page table), we can
experience floods of writes to a page, which have to be emulated. This is
expensive.
So, if we detect such a flood, zap the page so subsequent writes can proceed
natively.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 6e4daf4..201b273 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -238,6 +238,9 @@ struct kvm_vcpu { struct kvm_mmu_page page_header_buf[KVM_NUM_MMU_PAGES]; struct kvm_mmu mmu; + gfn_t last_pt_write_gfn; + int last_pt_write_count; + struct kvm_guest_debug guest_debug; char fx_buf[FX_BUF_SIZE]; |
