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>
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index affea50..4686bf1 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -1218,6 +1218,7 @@
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 @@
stat->d_nomsg++;
else if (count > 1)
stat->d_multmsg++;
-
- ack_APIC_irq();
}
/*