2.6.33-longterm review patch. If anyone has any objections, please let us know.
------------------ From: Jack Steiner <stei...@sgi.com> 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 <stei...@sgi.com> Link: http://lkml.kernel.org/r/20110805140900.ga6...@sgi.com Signed-off-by: Ingo Molnar <mi...@elte.hu> Signed-off-by: Greg Kroah-Hartman <gre...@suse.de> --- arch/x86/kernel/apic/x2apic_uv_x.c | 1 - 1 file changed, 1 deletion(-) --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -139,7 +139,6 @@ static int __cpuinit uv_wakeup_secondary ((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) | _______________________________________________ stable mailing list stable@linux.kernel.org http://linux.kernel.org/mailman/listinfo/stable
