Date: Wed, 29 Sep 2004 11:55:38 +0400 From: Andrew Belashov <bel@orel.ru> To: Kris Kennaway <kris@obsecurity.org> Cc: sparc64@freeBSD.org Subject: Re: panic: ipi_send: couldn't send ipi Message-ID: <415A6A7A.3070601@orel.ru> In-Reply-To: <20040928165449.GA3605@xor.obsecurity.org> References: <20040925070741.GA51297@xor.obsecurity.org> <20040927191430.GA718@electra.cse.Buffalo.EDU> <41591DD4.7000409@orel.ru> <20040928153451.GB27640@electra.cse.Buffalo.EDU> <20040928165449.GA3605@xor.obsecurity.org>
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Kris Kennaway wrote: >>Thank you very much for testing this out. >> >>Unless someone thinks this would be a problem I'll wait another couple >>of days and if nobody else has any further input I'll leave the existing >>code as-is but bump the max retries to 5000 for the 5.3 release. I'm >>still curious about what the underlying problem is but it'll take some >>time to track down I think. I did manage to find a machine to test >>this on late yesterday and some initial attempts at triggering the >>problem by generating a lot of disk I/O didn't seem to trigger it. >> >>Your case seems to be a bit extreme - I'm wondering if it has something >>to do with the Creator 3D. I don't think it is the only thing that can >>cause the problem to crop up but it might be something that makes the >>situation "worse". >> >>Kris, was your problem machine one of the machines here? > > > I don't remember if any of those were SMP, but this was on phk's dual > u60. I applied the patch in PR 66314, and while I haven't had a > repeat of the ipi panic, it did fall over with one of the other panics > I regularly see on this machine. Also, jhb seemed to think there was > an underlying MI problem, and this patch would only delay the > occurence of the panic. > > Kris The problem does not arise in the following cases: kernel build without SMP option; kernel running on uniprocessor machine (with or without SMP option). The problem is somehow related to Creator 3D. To reproduce problem I use any program, that generate large output. For example: "ls -laR /" Andrew
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