[IA64] smp_flush_tlb_mm() should only send IPI's to cpus in cpu_vm_mask

Browse source

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>

...

This commit is contained in:

Dimitri Sivanich 2009-04-15 10:56:25 -05:00 • committed by Tony Luck

parent c4cb768f02

commit edb91dc01a

1 changed files with 5 additions and 8 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

arch/ia64/kernel/smp.c

View file