From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hubert Tonneau <hubert.tonneau@fullpliant.org>
Subject: MD RAID1 deadlock on failed disk
Date: Tue, 26 Oct 2010 22:32:21 GMT
Message-ID: <0AFDL9Y11@briare1.fullpliant.org>
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Return-path: <linux-raid-owner@vger.kernel.org>
Sender: linux-raid-owner@vger.kernel.org
To: linux-raid@vger.kernel.org
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Hi,

The configuration is:
Perc H200 controler configured with no RAID (mpt2sas driver),
2 SATA disks (sda and sdb),
Linux MD Sofware RAID1 (md0),
stock Linux 2.6.35.7 kernel.

I hotunplug the second (sdb) disk, and the result is:
. as expected, I can read sda device,
. as expected, any read to sdb device fails,
. unexpectedly, and read to md0 never returns.

No oops or thing like that in the kernel log.
I did not try the same with other kernel releases.

Regards,
Hubert Tonneau