From: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Date: Thu, 1 Mar 2012 10:32:16 +0000 (+0900)
Subject: KVM: Avoid checking huge page mappings in get_dirty_log()
X-Git-Tag: v3.5-rc1~88^2~96
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5dc99b2380d59b8aeafa98791f92b96400ed3187;p=pandora-kernel.git

KVM: Avoid checking huge page mappings in get_dirty_log()

Dropped such mappings when we enabled dirty logging and we will never
create new ones until we stop the logging.

For this we introduce a new function which can be used to write protect
a range of PT level pages: although we do not need to care about a range
of pages at this point, the following patch will need this feature to
optimize the write protection of many pages.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
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