More on the blkfree panic

[Joe Marcus Clarke]

On Sat, 2003-05-03 at 05:42, Don Lewis wrote:
> On  2 May, I wrote:
> > On  2 May, Scott A. Moberly wrote:
> >> On Fri, May 02, 2003 at 01:43:34PM -0700, Don Lewis wrote:
> >>> I haven't seen it on my 4/26 machine, though I haven't done anything
> >>> disc intensive (other than the daily cron jobs) since then. The reports
> >>> of this problem started showing up on 4/27, so I went hunting for
> >>> commits during the likely window using cvs diff.  There were a number of
> >>> vm locking changes made during that time, including some changes to
> >>> vfs_bio.c.  That's about as close as anything came to touching the
> >>> filesystem code.
> >> 
> >> Just to give a definate start point:
> >> 
> >> /Makefile.inc1/1.349/Fri May  2 18:26:15 2003//D2003.04.26.05.00.00
> >> 
> >> works fine.
> > 
> > Mine is somewhat newer than that, about 2003.04.27.02.00.00 UTC.  I just
> > ran a buildworld and unpacked ports.tgz and didn't run into any
> > problems.  I'll try stepping forward about 12 hours ...
> 
> Interesting ... I'm having problems reproducing this problem.
> 
> The first report of this bug landed in my inbox at about 15:12 UTC on
> April 27.  Someone else who reported the bug claimed to have cvsup'ed at
> about 10:00 UTC on that day.
> 
> I just did
> 	cvs -R update -Pd -D'4/27/2003 14:00:00 UTC'
> 	make buildworld
> 	make buildkernel
> 	make installkernel
> and rebooted.
> 
> I haven't managed to trigger the problem with a simultaneous buildworld
> and untaring ports.tgz.  I even suspected that this problem might be
> triggered by free memory pressure so I added
> 	hw.physmem="128M"
> to /boot/loader.conf and rebooted.  I've pushed the machine heavily into
> paging, but it still seems to be stable, but painfully sluggish.

I was also able to reproduce this, though not as reliably as my
localhost NFS mount trick, by doing a make extract in
x11/XFree86-4-libraries.  This was on a lightly loaded P4 with 1 GB of
RAM and UFS1 file systems.

Joe

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