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| author | Jack Steiner <steiner@sgi.com> | 2011-08-05 09:09:00 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-08-05 23:48:34 +0200 |
| commit | 05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed (patch) | |
| tree | dceeb82c6aa858f734a96c908e54070613002466 /arch/x86/kernel/apic | |
| parent | a3ea14df0e383f44dcb2e61badb71180dbffe526 (diff) | |
| download | blackbird-op-linux-05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed.tar.gz blackbird-op-linux-05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed.zip | |
x86, UV: Remove UV delay in starting slave cpus
Delete the 10 msec delay between the INIT and SIPI when starting
slave cpus. I can find no requirement for this delay. BIOS also
has similar code sequences without the delay.
Removing the delay reduces boot time by 40 sec. Every bit helps.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: <stable@kernel.org>
Link: http://lkml.kernel.org/r/20110805140900.GA6774@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index adc66c3a1fef..34b18594e724 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -207,7 +207,6 @@ static int __cpuinit uv_wakeup_secondary(int phys_apicid, unsigned long start_ri ((start_rip << UVH_IPI_INT_VECTOR_SHFT) >> 12) | APIC_DM_INIT; uv_write_global_mmr64(pnode, UVH_IPI_INT, val); - mdelay(10); val = (1UL << UVH_IPI_INT_SEND_SHFT) | (phys_apicid << UVH_IPI_INT_APIC_ID_SHFT) | |
