Date: Thu, 20 Dec 2001 14:59:16 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Brady Montz <bradym@mail.hydrologue.com> Cc: Peter Jeremy <peter.jeremy@alcatel.com.au>, Chad David <davidc@acns.ab.ca>, Richard Nyberg <rnyberg@it.su.se>, David Wolfskill <david@catwhisker.org>, freebsd-stable@FreeBSD.ORG Subject: Re: 4.4-STABLE crashes - suspects new ata-driver over wd-drivers Message-ID: <200112202259.fBKMxGi79320@apollo.backplane.com> References: <200112172133.fBHLXJg39627@bunrab.catwhisker.org> <20011217144541.A45973@colnta.acns.ab.ca> <20011218094330.A10601@gromit.it.su.se> <200112180857.fBI8vNh68173@apollo.backplane.com> <20011218023630.A5190@ranger.acns.ab.ca> <200112181920.fBIJKRt70523@apollo.backplane.com> <200112190757.fBJ7veY02579@mail.hydrologue.com> <200112190732.fBJ7WFQ86868@apollo.backplane.com> <87u1ulq1a8.fsf@balestra.org> <200112202147.fBKLlGg78745@apollo.backplane.com> <20011221094727.F73243@gsmx07.alcatel.com.au> <200112210400.fBL40O009107@mail.hydrologue.com>
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:I induced the crash by running "make clean; make buildworld" in one
:infinite loop and "portsdb -Uu" in another. That string occurs in a
:bunch of makefiles in /usr/ports. Some of the occurences in the core
:are clearly from them, but many of them are surrounded by binary
:data. I recursively grepped /usr/{src,obj,bin,ports} and
:/usr/local/{bin,lib} and didn't find any binary files with that
:string. My guess then is that it's from the memory image of a make
:process.
:
:--
: Brady Montz
This is soooo weird. The corruption is occuring in the vm_page_t itself,
at least in the crash you sent me. The vm_page_t is a locked-down
address in the kernel. It is not effecting the vm_page_t's around the
one that got corrupted. The corruption does not appear to be on a page
or device block boundry. I am at a loss as to how its getting there.
Could you try playing with the DMA modes on your IDE hard drive? Try
turning DMA off, for example, and see if the corruption still occurs.
-Matt
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