diff options
| author | Avi Kivity | 2007-01-06 01:36:50 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2007-01-06 08:55:26 +0100 |
| commit | 86a5ba025d0a0b251817d0efbeaf7037d4175d21 (patch) | |
| tree | 35dbc71edaa0d242ba4c0ca429c41cff67df38d0 /drivers/kvm/kvm.h | |
| parent | [PATCH] KVM: MMU: If an empty shadow page is not empty, report more info (diff) | |
| download | kernel-qcow2-linux-86a5ba025d0a0b251817d0efbeaf7037d4175d21.tar.gz kernel-qcow2-linux-86a5ba025d0a0b251817d0efbeaf7037d4175d21.tar.xz kernel-qcow2-linux-86a5ba025d0a0b251817d0efbeaf7037d4175d21.zip | |
[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 6e4daf404146..201b2735ca91 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]; |