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    SubjectRe: 2,6.26-rc4-git2 - long pause during boot
    On Fri, 6 Jun 2008 06:07:29 +0000 Chris Clayton <chris2553@googlemail.com> wrote:

    > On Friday 06 June 2008, Andrew Morton wrote:
    > > On Sun, 1 Jun 2008 04:15:05 +0000 Chris Clayton <chris2553@googlemail.com>
    > wrote:
    > > > Hi,
    > > >
    > > > I've just started testing 2.6.26 on my desktop machine and have found
    > > > that I get a long pause (20 seconds or so) as the system boots. By pause
    > > > I mean that the boot messages that normally scroll by stop doing so for,
    > > > as I say, about 20 seconds.
    > > >
    > > > I've done a bisect and arrived at:
    > > >
    > > > b0ed43360fdca227048d88a08290365cb681c1a8 is first bad commit
    > > > commit b0ed43360fdca227048d88a08290365cb681c1a8
    > > > Author: Hannes Reinecke <hare@suse.de>
    > > > Date: Tue Mar 18 14:32:28 2008 +0100
    > > >
    > > > [SCSI] add scsi_host and scsi_target to scsi_bus
    > > >
    > > > This patch implements scsi_host and scsi_target device types
    > > > and adds both to the scsi_bus.
    > > >
    > > > Signed-off-by: Hannes Reinecke <hare@suse.de>
    > > > Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
    > > > Signed-off-by: James Bottomley
    > > > <James.Bottomley@HansenPartnership.com>
    > > >
    > > > :040000 040000 4e3140909966b4c9aa987d34ee4078d283fe0351
    > > >
    > > > 46e4fd28cc537ba700eb4f5652abf043fed4d76d M drivers
    > > >
    > > > The config file for that kernel is attached as are the kernel log for
    > > > booting that kernel and the bisect log.
    > > >
    > > > I've also noticed that it takes much longer for icons to appear on my
    > > > desktop when I plug a usb storage device in. (The icons are shown/hidden
    > > > by a simple sctript that is run via udev when the device is
    > > > attached/detached.)
    > >
    > > Do you believe that this is the same period? 20 seconds?
    > >
    >
    > Thanks for the reply, Andrew. I was beginning to think that I'd committed an
    > LKML sin :-)

    Well you did - you reported a bug.

    <watches wodim wibble for five minutes then report "CD/DVD-Recorder
    not ready." Pretends not to have noticed.>

    > Yes, it is about the same. On 2.6.25.4 (and earlier), the icons appear within a
    > second or two, but with 2.6.26-rc2 or later, it takes about 20 seconds. I've
    > now built and installed -rc5 and am seeing the same behaviour.
    >
    > I've also built -rc5 on my laptop. On that my kernel uses the older IDE drivers
    > rather than libata. The boot proceeds with no pause, but I do see the same
    > delay in the desktop icons appearing when I attach a usb-storage device.

    OK that makes sense. ata and usb use the scsi layer. IDE does not.



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