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From: Chris Friesen <chris.friesen@genband.com>
To: Neil Brown <neilb@suse.de>, linux-raid@vger.kernel.org
Subject: hung in raise_barrier() in raid1.c  -- any ideas?
Date: Thu, 20 Sep 2012 10:52:50 -0600	[thread overview]
Message-ID: <505B49E2.8070109@genband.com> (raw)


Hi,

I've got a fairly beefy (32 cpus, 64GB ram, isci-based SAS disks, etc.) 
embedded system running 2.6.27.

We're seeing issues where disk operations suddenly seem to stall.  In 
the most recent case we had the hung-task watchdog indicate that 
md1_resync was stuck for more than 120sec in raise_barrier().

There are a bunch of "normal" tasks also stuck in wait_barrier(), so 
based on that I assume we're stuck in the second call to 
wait_event_lock_irq().

Has anyone seen anything like this?  Could commit 73d5c38 be related? 
What about 1d9d524?

Also, what's the meaning of RESYNC_DEPTH?

Thanks,
Chris

-- 

Chris Friesen
Software Designer

3500 Carling Avenue
Ottawa, Ontario K2H 8E9
www.genband.com

             reply	other threads:[~2012-09-20 16:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-20 16:52 Chris Friesen [this message]
2012-09-20 17:55 ` hung in raise_barrier() in raid1.c -- any ideas? Chris Friesen
2012-09-20 21:27   ` NeilBrown
2012-09-20 23:05     ` Chris Friesen
2012-09-21  2:16       ` NeilBrown

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