diff options
| author | Rik van Riel <riel@surriel.com> | 2012-12-12 04:01:44 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 05:22:25 +0400 |
| commit | e4c6bfd2d79d063017ab19a18915f0bc759f32d9 (patch) | |
| tree | 4f97a0303f939a7846a86c7ade2533a8e2712f29 /arch/x86 | |
| parent | 5a0768f641a5bad844860e67250baf0d1aa5e03c (diff) | |
| download | linux-e4c6bfd2d79d063017ab19a18915f0bc759f32d9.tar.xz | |
mm: rearrange vm_area_struct for fewer cache misses
The kernel walks the VMA rbtree in various places, including the page
fault path. However, the vm_rb node spanned two cache lines, on 64 bit
systems with 64 byte cache lines (most x86 systems).
Rearrange vm_area_struct a little, so all the information we need to do a
VMA tree walk is in the first cache line.
[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86')
0 files changed, 0 insertions, 0 deletions