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| author | Ingo Molnar <mingo@elte.hu> | 2007-11-07 18:37:48 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@apollo.(none)> | 2007-11-17 16:27:00 +0100 |
| commit | 4307d1e5ada595c87f9a4d16db16ba5edb70dcb1 (patch) | |
| tree | bae1a90cc162a0d5bd1a78290ffb1f445fc07d80 /ipc | |
| parent | 434b3d3209a8d8dcda63c3b14815659f4671b0a8 (diff) | |
| download | blackbird-op-linux-4307d1e5ada595c87f9a4d16db16ba5edb70dcb1.tar.gz blackbird-op-linux-4307d1e5ada595c87f9a4d16db16ba5edb70dcb1.zip | |
x86: ignore the sys_getcpu() tcache parameter
dont use the vgetcpu tcache - it's causing problems with tasks
migrating, they'll see the old cache up to a jiffy after the
migration, further increasing the costs of the migration.
In the worst case they see a complete bogus information from
the tcache, when a sys_getcpu() call "invalidated" the cache
info by incrementing the jiffies _and_ the cpuid info in the
cache and the following vdso_getcpu() call happens after
vdso_jiffies have been incremented.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Ulrich Drepper <drepper@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions
