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authorIngo Molnar <mingo@elte.hu>2007-11-07 18:37:48 +0100
committerThomas Gleixner <tglx@apollo.(none)>2007-11-17 16:27:00 +0100
commit4307d1e5ada595c87f9a4d16db16ba5edb70dcb1 (patch)
treebae1a90cc162a0d5bd1a78290ffb1f445fc07d80 /arch/x86/kernel/cpu/mcheck/mce_64.c
parent434b3d3209a8d8dcda63c3b14815659f4671b0a8 (diff)
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 'arch/x86/kernel/cpu/mcheck/mce_64.c')
0 files changed, 0 insertions, 0 deletions