[tip:x86/urgent] x86/UV2: Ack BAU interrupt earlier
From: tip-bot for Cliff Wickman
Date: Tue Jan 17 2012 - 12:23:32 EST
Commit-ID: 88ed9dd7f63c3ae71c1984d99ee2dced0b386dea
Gitweb: http://git.kernel.org/tip/88ed9dd7f63c3ae71c1984d99ee2dced0b386dea
Author: Cliff Wickman <cpw@xxxxxxx>
AuthorDate: Mon, 16 Jan 2012 15:21:46 -0600
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Tue, 17 Jan 2012 09:09:57 +0100
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@xxxxxxx>
Link: http://lkml.kernel.org/r/20120116212146.GE5767@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
arch/x86/platform/uv/tlb_uv.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
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 @@ 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();
}
/*
--
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