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| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2008-12-31 22:44:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-02 17:16:29 +0100 |
| commit | 26799a63110dcbe81291ea53178f6b4810d07424 (patch) | |
| tree | 0bdbd0ff3ed50b310d3851f8ab203e7b9c8c4a3c /block/blk-sysfs.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir... (diff) | |
| download | linux-26799a63110dcbe81291ea53178f6b4810d07424.tar.xz linux-26799a63110dcbe81291ea53178f6b4810d07424.zip | |
x86: fix incorrect __read_mostly on _boot_cpu_pda
The pda rework (commit 3461b0af025251bbc6b3d56c821c6ac2de6f7209)
to remove static boot cpu pdas introduced a performance bug.
_boot_cpu_pda is the actual pda used by the boot cpu and is definitely
not "__read_mostly" and ended up polluting the read mostly section with
writes. This bug caused regression of about 8-10% on certain syscall
intensive workloads.
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Acked-by: Mike Travis <travis@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'block/blk-sysfs.c')
0 files changed, 0 insertions, 0 deletions