In the last case, the syslogd process and a tail -f on
/var/log/messages were hung. Running "ps afxlw" showed (if I am
reading it correctly) that the processes were in "wait_on_buf". Of
course, with syslogd stuck, I was unable to perform any operation
that wrote a syslog message.
If anyone has any instructions on how to get more information out
of a stuck process, please let me know. Also, I will open an
invitation to anyone who wants to look at my system over the internet.
On Tue, 24 Feb 1998 15:23:53 +0100, Rik van Riel wrote:
> On Tue, 24 Feb 1998, Richard Jones wrote:
> > Rik van Riel wrote:
> > > On Mon, 23 Feb 1998, Steve Hsieh wrote:
> > >
> > > > It seems that the common thread among all of us is that we have the
> > > > aic7xxx SCSI controller? And it seems that using the 5.0.5 (5.0.7?)
> > > > aic7xxx driver will avoid this problem.
> > >
> > > I've also seen it with 2.1.76 - .84 on an Advansys ABP940U
> > > SCSI controller with a drive with a small firmware bug.
> > I should add here that the __wait_on_page bug
> > has nothing to do with SCSI at all. The process
> > hangs accessing a large software RAID 5 partition
> OK, so we can conclude that the hang occurs somewhere
> higher up in the kernel. Maybe in the block device
> handling or in ll_rw_blk.c...
> And it must be something subtle since we haven't found
> anything obvious yet :-( ...Time for a detective...
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