From: Andi Kleen <ak@suse.de>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Readd BUG for SMP TLB IPI
Date: Wed, 9 Jul 2003 13:41:09 +0200 [thread overview]
Message-ID: <20030709134109.65efa245.ak@suse.de> (raw)
In-Reply-To: <1057750022.6255.41.camel@dhcp22.swansea.linux.org.uk>
On 09 Jul 2003 12:27:02 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> We have recorded retransmitted IPI's on some boards (notably the
> infamous BP6). They do happen. Early 2.4 had a fix for handling the
> replay case too, but someone lost it and BP6 boards no longer work as
> reliably.
Ok, all non broken hardware.
>
> An IPI can be retried and the retry for dual PII at least seems to hit
> all the CPUs. Even on a 2 CPU box this has been observed - I assume
> because the error was raised by the IO APIC when it got a garbled IPI.
I don't believe it. It would cause an immediate hang because the goto out
does not ack the IPI. Surely such hangs would have been reported?
-Andi
next prev parent reply other threads:[~2003-07-09 11:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-09 10:49 [PATCH] Readd BUG for SMP TLB IPI Andi Kleen
2003-07-09 11:27 ` Alan Cox
2003-07-09 11:41 ` Andi Kleen [this message]
2003-07-09 16:53 ` Alan Cox
2003-07-09 16:58 ` Andi Kleen
2003-07-09 17:04 ` Alan Cox
2003-07-09 17:32 ` Andi Kleen
2003-07-09 23:38 ` Alan Cox
2003-07-09 17:37 ` Compile failure 2.4.22-pre3-ac1 Midian
2003-07-09 18:10 ` Steven Cole
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