Commit 88ed9dd7 authored Jan 16, 2012 by Cliff Wickman Committed by Ingo Molnar Jan 17, 2012

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>

parent 478c6e52

arch/x86/platform/uv/tlb_uv.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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();
		}

		/*