From: Takuya Yoshikawa Date: Wed, 21 Mar 2012 14:49:39 +0000 (+0900) Subject: KVM: MMU: Make pte_list_desc fit cache lines well X-Git-Tag: v3.5-rc1~88^2~40 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=220f773a0013bf6fe2eefd9718ac7471f368fd8e;p=pandora-kernel.git KVM: MMU: Make pte_list_desc fit cache lines well We have PTE_LIST_EXT + 1 pointers in this structure and these 40/20 bytes do not fit cache lines well. Furthermore, some allocators may use 64/32-byte objects for the pte_list_desc cache. This patch solves this problem by changing PTE_LIST_EXT from 4 to 3. For shadow paging, the new size is still large enough to hold both the kernel and process mappings for usual anonymous pages. For file mappings, there may be a slight change in the cache usage. Note: with EPT/NPT we almost always have a single spte in each reverse mapping and we will not see any change by this. Signed-off-by: Takuya Yoshikawa Signed-off-by: Avi Kivity --- Reading git-diff-tree failed