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(parent: a3ea14d) | patch
x86, UV: Remove UV delay in starting slave cpus
authorJack Steiner <steiner@sgi.com>
Fri, 5 Aug 2011 14:09:00 +0000 (09:09 -0500)
committerIngo Molnar <mingo@elte.hu>
Fri, 5 Aug 2011 21:48:34 +0000 (23:48 +0200)
commit05e33fc20ea5e493a2a1e7f1d04f43cdf89f83ed
treedceeb82c6aa858f734a96c908e54070613002466tree | snapshot (tar.gz zip)
parenta3ea14df0e383f44dcb2e61badb71180dbffe526commit | diff
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>
arch/x86/kernel/apic/x2apic_uv_x.c diff | blob | blame | history