Fw: [Bugme-new] [Bug 8141] New: Adaptec 39320D and long boot

Fw: [Bugme-new] [Bug 8141] New: Adaptec 39320D and long boot

[Andrew Morton]

41-second delay when mounting root fs.

Begin forwarded message:

Date: Wed, 7 Mar 2007 06:15:45 -0800
From: bugme-daemon@bugzilla.kernel.org
To: bugme-new@lists.osdl.org
Subject: [Bugme-new] [Bug 8141] New: Adaptec 39320D and long boot


http://bugzilla.kernel.org/show_bug.cgi?id=8141

           Summary: Adaptec 39320D and long boot
    Kernel Version: 2.6.20.1
            Status: NEW
          Severity: normal
             Owner: io_scsi@kernel-bugs.osdl.org
         Submitter: karaluh@tlen.pl


Most recent kernel where this bug did *NOT* occur: none
Distribution: kubuntu

Hardware Environment: 
02:0a.1 SCSI storage controller: Adaptec ASC-39320D (rev 03)

Software Environment:
Gnu C                  4.1.2
Gnu make               3.81
binutils               2.17
util-linux             2.12r
module-init-tools      3.2.2
Linux C Library        > libc.2.4
Dynamic linker (ldd)   2.4
Procps                 3.2.7
udev                   093

Problem Description:
The system boots long with Adaptec 39320D pluged in. It happens in all distro 
kernels i used and in 2.6.20.1 compiled by myself. Some more info here:
https://launchpad.net/ubuntu/+bug/79542

Steps to reproduce:
Plug Adaptec 39320D and boot.

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Re: Fw: [Bugme-new] [Bug 8141] New: Adaptec 39320D and long boot

[James Bottomley]

On Wed, 2007-03-07 at 12:33 -0800, Andrew Morton wrote:
> 41-second delay when mounting root fs.

This sounds like a user configuration error.  The adaptec has a bus
settle time in its initialisation path.  Originally it was 20s, hence
for a D card (twin channel) it would take about 50s to come online
(extra 5s to scan per channel).  There was a lot of argument about this,
and the value was finally made configurable as

CONFIG_AIC79XX_RESET_DELAY_MS

I suspect you have this set to around 15000.  You can make the boot
sequence shorter by reducing this value.  I believe Red Hat configures
it down to the default 5000.

James

Re: Fw: [Bugme-new] [Bug 8141] New: Adaptec 39320D and long boot

[Andrew Morton]

> On Sun, 11 Mar 2007 13:03:44 -0500 James Bottomley <James.Bottomley@SteelEye.com> wrote:
> On Wed, 2007-03-07 at 12:33 -0800, Andrew Morton wrote:
> > 41-second delay when mounting root fs.
> 
> This sounds like a user configuration error.  The adaptec has a bus
> settle time in its initialisation path.  Originally it was 20s, hence
> for a D card (twin channel) it would take about 50s to come online
> (extra 5s to scan per channel).  There was a lot of argument about this,
> and the value was finally made configurable as
> 
> CONFIG_AIC79XX_RESET_DELAY_MS
> 
> I suspect you have this set to around 15000.  You can make the boot
> sequence shorter by reducing this value.  I believe Red Hat configures
> it down to the default 5000.
> 
> James

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