Date: Thu, 20 Dec 2001 20:00:24 -0800 From: Brady Montz <bradym@mail.hydrologue.com> To: Peter Jeremy <peter.jeremy@alcatel.com.au> Cc: Matthew Dillon <dillon@apollo.backplane.com>, 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: <200112210400.fBL40O009107@mail.hydrologue.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>
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Peter Jeremy <peter.jeremy@alcatel.com.au> writes:
> On 2001-Dec-20 13:47:16 -0800, Matthew Dillon <dillon@apollo.backplane.com> wrote:
> > The string 'pre-fetch' is sitting right smack in the middle of the
> > VM_PAGE!!!!!!!. The entire vm_page is corrupt, though the vm_page's
> > surrounding it appear to be ok.
> >
> > When I look for 'pre-fetch' in the raw vmcore file I see it occuring
> > all over the place.
>
> Any guess where it's coming from? I can't find that string anywhere
> in the -stable source code or kernel - which suggests that it's being
> read from the disk.
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
bradym@balestra.org
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