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authorJack Steiner <steiner@sgi.com>2011-08-05 16:09:00 +0200
committerIngo Molnar <mingo@elte.hu>2011-08-05 23:48:34 +0200
commit05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed (patch)
treedceeb82c6aa858f734a96c908e54070613002466
parentx86, olpc: Wait for last byte of EC command to be accepted (diff)
downloadlinux-05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed.tar.xz
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>
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c1
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) |