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| author | Cliff Wickman <cpw@sgi.com> | 2012-01-16 15:21:46 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-01-17 09:09:57 +0100 |
| commit | 88ed9dd7f63c3ae71c1984d99ee2dced0b386dea (patch) | |
| tree | c08a108089b7ab2e819bba86aef61d093a8b75ed | |
| parent | 478c6e529e7bd7c6ef8994c55bd252c287c35893 (diff) | |
| download | linux-88ed9dd7f63c3ae71c1984d99ee2dced0b386dea.tar.gz linux-88ed9dd7f63c3ae71c1984d99ee2dced0b386dea.tar.bz2 linux-88ed9dd7f63c3ae71c1984d99ee2dced0b386dea.zip | |
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>
| -rw-r--r-- | 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 affea509c174..4686bf1e56ec 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(); } /* |