diff options
| author | Jack Steiner <steiner@sgi.com> | 2011-08-05 09:09:00 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-29 13:29:14 -0700 |
| commit | 2498959a006e04fb2491e44796a88082dba5923f (patch) | |
| tree | 58807a1e4c3849f172bf84ba6eff3c1a1a11abcc /arch | |
| parent | 2f431897688c7f81be23ca316a9682c889ac09e0 (diff) | |
x86, UV: Remove UV delay in starting slave cpus
commit 05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed upstream.
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>
Link: http://lkml.kernel.org/r/20110805140900.GA6774@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -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) | |