Re: 2.6.12-rc2-mm3

Andrew Morton
2005-04-12T11:43:30Z

Ed Tomlinson <tomlins@cam.org> wrote:
>
> On Monday 11 April 2005 04:25, Andrew Morton wrote:
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc2/2.6.12-rc2-mm3/
> >
> >
> > - The anticipatory I/O scheduler has always been fairly useless with SCSI
> >   disks which perform tagged command queueing.  There's a patch here from Jens
> >   which is designed to fix that up by constraining the number of requests
> >   which we'll leave pending in the device.
> >
> >   The depth currently defaults to 1.  Tunable in
> >   /sys/block/hdX/queue/iosched/queue_depth
> >
> >   This patch hasn't been performance tested at all yet.  If you think it is
> >   misbehaving (the usual symptom is processes stuck in D state) then please
> >   report it, then boot with `elevator=cfq' or `elevator=deadline' to work
> >   around it.
> >
> > - More CPU scheduler work.  I hope someone is testing this stuff.
>
> Something is not quite right here. I built rc2-mm3 and booted (uni processor, amd64, preempt on).
> mm3 lasted about 30 mins before locking up with a dead keyboard. I had mm2 reboot a few times
> over the last couple of days too.
>
> 11-mm3 uptime of 2 weeks+
> 12-rc2-mm2 reboots once every couple of days
> 12-rc2-mm3 locked up within 30 mins using X using kmail/bogofilter

Unpleasant. Serial console would be nice ;)

> My serial console does not seem to want to work. Has anything changed with this support?
>

Don't think so - it works OK here. Checked the .config? Does the serial
port work if you do `echo foo > /dev/ttyS0'? ACPI?