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 <[email protected]>
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 <[email protected]>
---
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;
}
-
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