Date: Tue, 25 Sep 2001 00:01:10 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Julian Elischer <julian@elischer.org> Cc: Matt Dillon <dillon@earth.backplane.com>, hackers@freebsd.org Subject: Re: VM Corruption - stumped, anyone have any ideas? Message-ID: <200109250001.aa92227@salmon.maths.tcd.ie> In-Reply-To: Your message of "Mon, 24 Sep 2001 15:44:15 PDT." <Pine.BSF.4.21.0109241540230.51124-100000@InterJet.elischer.org>
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> >The pointers in the last few entries of the vm_page_buckets array got >corrupted when an agument to a function that manipulated whatever was next >in ram was 0, and it turned out that it was 0 because > of some PTE flushing thing (you are the one that found it... remember?) I think I've also seen a few reports of programs exiting with "Profiling timer expired" messages with 4.4. These can be caused by stack overflows, since the p_timer[] array in struct pstats is one of the things that I think lives below the per-process kernel stack. I wonder if they are related? Stack overflows could result in corruption of local variables, after which anything could happen. That said, hardware problems are still a possiblilty. Ian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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