Re: 2,6.26-rc4-git2 - long pause during boot

Chris Clayton
2008-06-13T06:56:42Z

Hi James,

On Wednesday 11 June 2008, James Bottomley wrote:
> On Wed, 2008-06-11 at 21:29 +0200, Stefan Richter wrote:
> > James Bottomley wrote:
> > > On Wed, 2008-06-11 at 12:15 -0700, Greg KH wrote:
> > >> On Wed, Jun 11, 2008 at 06:58:05PM +0000, Chris Clayton wrote:
> > >>> Jun 11 17:48:13 upstairs udevd-event[1457]: wait_for_sysfs: wait for
> > >>> '/sys/devices/pci0000:00/0000:00:1e.0/0000:02:0a.2/usb11/11-2/11-2:1.
> > >>>0/host4/ioerr_cnt' for 20 mseconds Jun 11 17:48:18 upstairs last
> > >>> message repeated 236 times
> > >>
> > >> This doesn't look good. It looks like a udev rule in your system is
> > >> looking for a file that will never show up. That's a short way to a
> > >> long delay time :)
> > >>
> > >> Try commenting out the rule that does this and see if things are
> > >> fixed.
> > >
> > > Actually, there's something seriously wrong here: ioerr_cnt is a
> > > property of the device, not of the host (as in it will never appear
> > > under .../host4 but under .../host4/targetX:X:X/4:X:X:X/ioerr_cnt).
> > > Perhaps an investigation of why udevd-event is looking under host4/ is
> > > in order.
> >
> > So the change which commit b0ed43360fdca227048d88a08290365cb681c1a8
> > "[SCSI] add scsi_host and scsi_target to scsi_bus" introduced is leading
> > the udev scripts onto a wrong trail?
>
> Yes, I think so ... what it does is make us get bus events for the
> target as well as the lun, whereas without it we only get them for the
> lun. I think something is misparsing the new target event and this is
> where the trouble is coming from.
>

I assume that since we now the source of this problem, you can create it at
will. I only mention because if you need me to test a patch, it will have to be
before Tuesday, June 17 - I go on holiday (vacation) on that day.

Thanks

Chris
> James

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