From: bugme-daemon@bugzilla.kernel.org
To: linux-scsi@vger.kernel.org
Subject: [Bug 12195] "dd" make kernel panic
Date: Thu, 11 Dec 2008 01:05:59 -0800 (PST) [thread overview]
Message-ID: <20081211090559.1DF1610800C@picon.linux-foundation.org> (raw)
In-Reply-To: <bug-12195-11613@http.bugzilla.kernel.org/>
http://bugzilla.kernel.org/show_bug.cgi?id=12195
------- Comment #3 from yanmin_zhang@linux.intel.com 2008-12-11 01:05 -------
I instrumented kernel. below is some finding.
1) The disk isn't stable. If we run dd in a loop, sometimes the disk doesn't
work, so block request will expire to start a scsi error handling;
2) fussion driver has its own periodic (1 sec) checking in
mpt_fault_reset_work. If something is wrong, it will do a hardware reset and
flush all pending requests;
3) Step 1) and 2) have a race that a request might be flushed in step 2), but
step 1) releases the request firstly. Later on, when SOFTIRQ tries to release
the scsi_cmnd, kernel panic.
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next prev parent reply other threads:[~2008-12-11 9:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-11 2:07 [Bug 12195] New: "dd" make kernel panic bugme-daemon
2008-12-11 2:09 ` [Bug 12195] " bugme-daemon
2008-12-11 2:15 ` bugme-daemon
2008-12-11 3:12 ` bugme-daemon
2008-12-11 9:05 ` bugme-daemon [this message]
2008-12-11 15:17 ` James Bottomley
2008-12-11 9:26 ` bugme-daemon
2008-12-11 15:17 ` bugme-daemon
2008-12-11 19:45 ` bugme-daemon
2008-12-12 2:27 ` bugme-daemon
2008-12-12 10:22 ` Mike Anderson
2008-12-12 15:09 ` James Bottomley
2008-12-12 19:28 ` James Bottomley
2008-12-12 10:22 ` bugme-daemon
2008-12-12 15:09 ` bugme-daemon
2008-12-12 19:28 ` bugme-daemon
2008-12-13 17:58 ` bugme-daemon
2008-12-15 9:52 ` bugme-daemon
2008-12-15 10:39 ` bugme-daemon
2008-12-15 20:13 ` James Bottomley
2008-12-15 20:13 ` bugme-daemon
2008-12-16 5:12 ` bugme-daemon
2008-12-21 19:52 ` bugme-daemon
2008-12-13 16:29 2.6.28-rc8-git1: Reported regressions from 2.6.27 Rafael J. Wysocki
2008-12-13 16:33 ` [Bug #12195] "dd" make kernel panic Rafael J. Wysocki
2008-12-13 16:33 ` Rafael J. Wysocki
2008-12-20 21:56 2.6.28-rc9-git1: Reported regressions from 2.6.27 Rafael J. Wysocki
2008-12-20 22:00 ` [Bug #12195] "dd" make kernel panic Rafael J. Wysocki
2008-12-20 22:00 ` Rafael J. Wysocki
2008-12-21 13:52 ` James Bottomley
2008-12-21 13:52 ` James Bottomley
2008-12-21 19:52 ` Rafael J. Wysocki
2008-12-21 19:52 ` Rafael J. Wysocki
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