From: Borislav Petkov <bp@alien8.de>
To: Chen Yucong <slaoub@gmail.com>
Cc: tony.luck@intel.com, linux-kernel@vger.kernel.org,
linux-edac@vger.kernel.org
Subject: Re: [PATCH] x86/mce: Distirbute the clear operation of mces_seen to Per-CPU rather than only monarch CPU
Date: Mon, 19 May 2014 09:26:19 +0200 [thread overview]
Message-ID: <20140519072619.GA6311@pd.tnic> (raw)
In-Reply-To: <1400464540.9630.31.camel@debian>
On Mon, May 19, 2014 at 09:55:40AM +0800, Chen Yucong wrote:
> But all other CPUs also have to wait monarch CPU to exit from mce_end.
> What's the difference between monarch CPU and Per-CPU for clearing
> mces_seen? In practice, there is no difference between them. If we use
> monarch CPU to clear mces_seen, then Per-CPU variable can not play out
> its advantage.
I'll let you stare at mce_reign() a little bit longer... Also, pay
attention to its callsite, that might help.
> Well, in that case, why is there a need for time-out machine in MCE
> handler?
I'll let you figure this out yourself too - it is only fair.
:-)
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
next prev parent reply other threads:[~2014-05-19 7:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-18 15:05 [PATCH] x86/mce: Distirbute the clear operation of mces_seen to Per-CPU rather than only monarch CPU Chen Yucong
2014-05-18 16:35 ` Borislav Petkov
2014-05-19 1:55 ` Chen Yucong
2014-05-19 7:26 ` Borislav Petkov [this message]
2014-05-19 7:54 ` Chen Yucong
2014-05-19 8:18 ` Borislav Petkov
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