From: Takuya Yoshikawa Date: Tue, 8 Jan 2013 10:43:28 +0000 (+0900) Subject: KVM: Write protect the updated slot only when dirty logging is enabled X-Git-Tag: v3.9-rc1~97^2~46 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c972f3b125d8818748429b94cd2e59f473943a33;p=pandora-kernel.git KVM: Write protect the updated slot only when dirty logging is enabled Calling kvm_mmu_slot_remove_write_access() for a deleted slot does nothing but search for non-existent mmu pages which have mappings to that deleted memory; this is safe but a waste of time. Since we want to make the function rmap based in a later patch, in a manner which makes it unsafe to be called for a deleted slot, we makes the caller see if the slot is non-zero and being dirty logged. Reviewed-by: Marcelo Tosatti Signed-off-by: Takuya Yoshikawa Signed-off-by: Gleb Natapov --- Reading git-diff-tree failed