linux-kernel - Re: [PATCH -v2] x86: MCE: Re-implement MCE log ring buffer as per-CPU ring buffer

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Message-ID: <20090429061148.GQ27382@one.firstfloor.org>
Date:	Wed, 29 Apr 2009 08:11:48 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andi Kleen <ak@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v2] x86: MCE: Re-implement MCE log ring buffer as per-CPU ring buffer

> Maybe the comment is a little confusing. What we do is limit the size of
> user buffer size to prevent system from not response. If the user buffer

Ah. The standard way to handle this is to add cond_resched()s where
appropiate. Maybe that would be an alternative or is that not
possible? You have to drop locks of course.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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