From: Mike Anderson <andmike@us.ibm.com>
To: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Cc: James.Smart@Emulex.Com, linux-scsi@vger.kernel.org
Subject: Re: lpfc: System freezing if fiber is broken
Date: Tue, 26 Jul 2005 11:48:00 -0700 [thread overview]
Message-ID: <20050726184800.GA19810@us.ibm.com> (raw)
In-Reply-To: <42E679A2.1060408@fujitsu-siemens.com>
Bodo Stroesser [bstroesser@fujitsu-siemens.com] wrote:
> Hi James,
>
> disrupting a working FC connection makes my i386 SMP server
> (2.6.12.2) freeze just one or two seconds after this.
> I'm normally using lpfc_nodev_tmo = 1. When I change this to the
> default value of 35, the system stalls about 36 seconds after
> disruption. So I guess, the problem is caused by nodev_tmo
> expiring.
> I activated the nmi_watchdog, but no output.
>
> What can I do to analyze this problem?
Does changing the timeout for a scsi device also alter the problem. In the
past people have seen issues of the nodev_tmo expiring near the scsi
timeout. This past cases lead to devices being offlined, but may this
could be causing a different symptom on your system.
You can change the timeout for the device by echoing a higher value into
/sys/bus/scsi/devices/${nexus}/timeout.
Is this a full system freeze or only the controlling console?
-andmike
--
Michael Anderson
andmike@us.ibm.com
next prev parent reply other threads:[~2005-07-26 18:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-26 17:57 lpfc: System freezing if fiber is broken Bodo Stroesser
2005-07-26 18:48 ` Mike Anderson [this message]
2005-07-27 13:45 ` Bodo Stroesser
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050726184800.GA19810@us.ibm.com \
--to=andmike@us.ibm.com \
--cc=James.Smart@Emulex.Com \
--cc=bstroesser@fujitsu-siemens.com \
--cc=linux-scsi@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.