From: Andi Kleen <ak@suse.de>
To: Linus Torvalds <torvalds@osdl.org>
Cc: willy@debian.org, ishii.hironobu@jp.fujitsu.com,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org
Subject: Re: [RFC/PATCH, 2/4] readX_check() performance evaluation
Date: Wed, 28 Jan 2004 21:09:21 +0000 [thread overview]
Message-ID: <20040128220921.7ba0bb78.ak@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.58.0401281221320.28145@home.osdl.org>
On Wed, 28 Jan 2004 12:28:56 -0800 (PST)
Linus Torvalds <torvalds@osdl.org> wrote:
>
> Alternatively, if you get a lot of information at MCE time (CPU that did
> the access + some device data), just queue up the information in a per-CPU
> queue. You don't have to worry about overflow - you can just drop if if
That assumes that the access happened with preempt off ?
That's fine if it's guaranteed that the MCE still happened inside
readl/writel. But if it's delayed longer for some reason there is no guarantee
that you can find back to the CPU that caused the fault.
Putting it into the pci_dev and using RCU would be probably better.
-Andi
next prev parent reply other threads:[~2004-01-28 21:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-28 1:54 [RFC/PATCH, 2/4] readX_check() performance evaluation Hironobu Ishii
2004-01-28 2:55 ` Linus Torvalds
2004-01-28 4:44 ` Paul Mackerras
2004-01-28 8:58 ` Russell King
2004-01-28 16:15 ` Linus Torvalds
2004-01-28 17:01 ` Grant Grundler
2004-01-28 18:20 ` Matthew Wilcox
2004-01-28 19:19 ` Andi Kleen
2004-01-28 19:33 ` Linus Torvalds
2004-01-28 19:40 ` Andi Kleen
2004-01-28 20:06 ` Linus Torvalds
2004-01-28 20:15 ` Andi Kleen
2004-01-28 20:19 ` [RFC/PATCH, 2/4] readX_check() performance evaluation II Andi Kleen
2004-01-28 20:28 ` [RFC/PATCH, 2/4] readX_check() performance evaluation Linus Torvalds
2004-01-28 20:30 ` Linus Torvalds
2004-01-28 21:09 ` Andi Kleen [this message]
2004-01-28 21:43 ` Linus Torvalds
2004-01-28 21:52 ` Andi Kleen
2004-01-28 22:21 ` Linus Torvalds
2004-01-28 22:39 ` Andi Kleen
2004-01-28 22:59 ` Linus Torvalds
2004-01-29 12:24 ` Hironobu Ishii
2004-01-28 22:15 ` David S. Miller
2004-01-28 3:09 ` Matthew Wilcox
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