Re: 2.6.24-rc3-mm1

Andrew Morton
2007-11-27T06:15:31Z

On Fri, 23 Nov 2007 06:55:41 +0100 Gabriel C <nix.or.die@googlemail.com> wrote:

> Andrew Morton wrote:
> > On Fri, 23 Nov 2007 02:39:08 +0100 Gabriel C <nix.or.die@googlemail.com> wrote:
> >
> >> I have some warnings on each SCSI disc:
> >>
> >>
> >> ...
> >>
> >> [ 30.724410] scsi 0:0:0:0: Direct-Access SEAGATE ST318406LW 0109 PQ: 0 ANSI: 3
> >> [ 30.724419] scsi0:A:0:0: Tagged Queuing enabled. Depth 32
> >> [ 30.724435] target0:0:0: Beginning Domain Validation
> >> [ 30.724446] target0:0:0: Domain Validation Initial Inquiry Failed <--
> >> [ 30.724572] target0:0:0: Ending Domain Validation
> >> [ 30.729747] scsi 0:0:1:0: Direct-Access FUJITSU MAH3182MP 0114 PQ: 0 ANSI: 4
> >> [ 30.729754] scsi0:A:1:0: Tagged Queuing enabled. Depth 32
> >> [ 30.729771] target0:0:1: Beginning Domain Validation
> >> [ 30.729780] target0:0:1: Domain Validation Initial Inquiry Failed <--
> >> [ 30.729908] target0:0:1: Ending Domain Validation
> >>
> >
> > Don't know what would have caused that. But yes, something is wrong in
> > scsi land.
>
> Actually I'm lucky the author didn't fix that FIXME in scsi_transport_spi.c and I still can boot ;)
>
> >
> >> no idea whatever this is related but buffered disk reads are 2.XX MB/sec and the box is somewhat laggy.
> >>
> >> hdparm -t on sda and sdb reports :
> >>
> >> /dev/sda:
> >> Timing buffered disk reads: 8 MB in 3.26 seconds = 2.46 MB/sec
> >>
> >> /dev/sdb:
> >> Timing buffered disk reads: 8 MB in 3.56 seconds = 2.25 MB/sec
> >>
> >> My IDE discs are fine.
> >>
> >> Please let me know if you need my config or any other informations.
> >>
> >
> > And you're the second to report very slow scsi throughput in 2.6.24-rc3-mm1.
> >
>
> I found the commit which cause these problems , it is in git-scsi-misc patch and reverting it fixes both problems for me.
>
> http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-misc-2.6.git;a=commitdiff_plain;h=8655a546c83fc43f0a73416bbd126d02de7ad6c0;hp=5bc717b6bdaaf52edf365eb7d9d8c89fec79df5d
>

OK, thanks. I'll assume that James and Hannes have this in hand (or will
have, by mid-week) and I won't do anything here.