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x86/UV2: Ack BAU interrupt earlier 

This patch moves the ack of the BAU interrupt to the beginning
of  the interrupt handler so that there is less possibility of a
lost interrupt and slower response to a shootdown message.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120116212146.GE5767@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Cliff Wickman 2012-01-16 15:21:46 -06:00 committed by Ingo Molnar
parent 478c6e529e
commit 88ed9dd7f6
1 changed files with 1 additions and 2 deletions
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3
arch/x86/platform/uv/tlb_uv.c
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@ -1218,6 +1218,7 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
struct ptc_stats *stat;
struct msg_desc msgdesc;
ack_APIC_irq();
time_start = get_cycles();
bcp = &per_cpu(bau_control, smp_processor_id());
@ -1247,8 +1248,6 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
stat->d_nomsg++;
else if (count > 1)
stat->d_multmsg++;
ack_APIC_irq();
}
/*