Messages in this thread Patch in this message | | | Date | Fri, 25 May 2007 10:08:27 +0200 | From | Ingo Molnar <> | Subject | [patch] i386, numaq: enable TSCs again |
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Andi, Andrew, do you remember why we disabled TSCs on NUMAQ? It was slightly async between CPUs, right? In that case we should try the patch below.
Ingo
---------------------> Subject: [patch] i386, numaq: enable TSCs again From: Ingo Molnar <mingo@elte.hu>
enable TSCs on NUMAQ again. sched_clock() got improved and the scheduler treats it as a per-CPU clock, so there should be no issues from the slightly async TSCs on NUMAQ. Please holler if this is wrong ...
Signed-off-by: Ingo Molnar <mingo@elte.hu> --- arch/i386/kernel/numaq.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
Index: linux-cfs-2.6.22-rc2-mm1.q/arch/i386/kernel/numaq.c =================================================================== --- linux-cfs-2.6.22-rc2-mm1.q.orig/arch/i386/kernel/numaq.c +++ linux-cfs-2.6.22-rc2-mm1.q/arch/i386/kernel/numaq.c @@ -81,8 +81,7 @@ int __init get_memcfg_numaq(void) static int __init numaq_tsc_disable(void) { if (num_online_nodes() > 1) { - printk(KERN_DEBUG "NUMAQ: disabling TSC\n"); - tsc_disable = 1; + printk(KERN_DEBUG "NUMAQ: NOT disabling TSC. System still ok?\n"); } return 0; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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