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| author | Suresh Siddha <[email protected]> | 2008-11-04 21:53:04 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2008-11-06 08:41:49 +0000 |
| commit | d6f0f39b7d05e62b347c4352d070e4afb3ade4b5 (patch) | |
| tree | f5f2e844e5674b1d572be2b6e54fb36e5540cbe3 /net/unix/af_unix.c | |
| parent | x86: remove VISWS and PARAVIRT around NR_IRQS puzzle (diff) | |
| download | kernel-d6f0f39b7d05e62b347c4352d070e4afb3ade4b5.tar.gz kernel-d6f0f39b7d05e62b347c4352d070e4afb3ade4b5.zip | |
x86: add smp_mb() before sending INVALIDATE_TLB_VECTOR
Impact: fix rare x2apic hang
On x86, x2apic mode accesses for sending IPI's don't have serializing
semantics. If the IPI receivner refers(in lock-free fashion) to some
memory setup by the sender, the need for smp_mb() before sending the
IPI becomes critical in x2apic mode.
Add the smp_mb() in native_flush_tlb_others() before sending the IPI.
Signed-off-by: Suresh Siddha <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions