From: Avi Kivity <avi@qumranet.com>
Date: Sat, 6 Jan 2007 00:36:50 +0000 (-0800)
Subject: [PATCH] KVM: MMU: Page table write flood protection
X-Git-Tag: v2.6.20-rc4~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86a5ba025d0a0b251817d0efbeaf7037d4175d21;p=pandora-kernel.git

[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>
---

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