On Thu, May 22, 2014 at 02:32:51PM +0200, Peter Zijlstra wrote:
> So I think we can reduce it to just the one rwsem (with recursion) if we
> shoot CPU_POST_DEAD in the head.
Here's the first bullet. Stressing my box here with Steve's hotplug
script seems to work fine.
Tony, any objections?
---
From: Borislav Petkov <b...@suse.de>
Date: Thu, 22 May 2014 16:40:54 +0200
Subject: [PATCH] x86, MCE: Kill CPU_POST_DEAD
In conjunction with cleaning up CPU hotplug, we want to get rid of
CPU_POST_DEAD. Kill this instance here and rediscover CMCI banks at the
end of CPU_DEAD.
Signed-off-by: Borislav Petkov <b...@suse.de>
---
arch/x86/kernel/cpu/mcheck/mce.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 68317c80de7f..ee35d621815b 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2391,6 +2391,7 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned
long action, void *hcpu)
threshold_cpu_callback(action, cpu);
mce_device_remove(cpu);
mce_intel_hcpu_update(cpu);
+ cmci_rediscover();
break;
case CPU_DOWN_PREPARE:
smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
@@ -2402,11 +2403,6 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned
long action, void *hcpu)
break;
}
- if (action == CPU_POST_DEAD) {
- /* intentionally ignoring frozen here */
- cmci_rediscover();
- }
-
return NOTIFY_OK;
}
--
1.9.0
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
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