| commit | edb91dc01a216e84b78721b71a06db1e0db141b7 | |
| author | Dimitri Sivanich <sivanich@sgi.com> | |
| Wed, 15 Apr 2009 15:56:25 +0000 (15 10:56 -0500) | ||
| committer | Tony Luck <tony.luck@intel.com> | |
| Thu, 16 Apr 2009 18:51:35 +0000 (16 11:51 -0700) | ||
| tree | 9e030d23e6ccac225bce132d4bd5017720d8cfc8 | treesnapshot (tar.gz zip) |
| parent | c4cb768f027706b3a0190309416b13f07114fe56 | commitdiff |
[IA64] smp_flush_tlb_mm() should only send IPI's to cpus in cpu_vm_mask
Having flush_tlb_mm->smp_flush_tlb_mm() send an IPI to every cpu
on the system is occasionally triggering spin_lock contention in
generic_smp_call_function_interrupt().
Follow x86 arch's lead and only sends IPIs to the cpus in mm->cpu_vm_mask.
Experiments with this change have shown significant improvement in this
contention issue.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Having flush_tlb_mm->smp_flush_tlb_mm() send an IPI to every cpu
on the system is occasionally triggering spin_lock contention in
generic_smp_call_function_interrupt().
Follow x86 arch's lead and only sends IPIs to the cpus in mm->cpu_vm_mask.
Experiments with this change have shown significant improvement in this
contention issue.
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
| arch/ia64/kernel/smp.c | diffblobblamehistory |