From: Neil Brown <neilb@suse.de>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: Software RAID (non-preempt) server blocking question. (2.6.20.4)
Date: Thu, 29 Mar 2007 16:25:04 +1000 [thread overview]
Message-ID: <17931.23488.160031.119117@notabene.brown> (raw)
In-Reply-To: message from Justin Piszcz on Tuesday March 27
On Tuesday March 27, jpiszcz@lucidpixels.com wrote:
> I ran a check on my SW RAID devices this morning. However, when I did so,
> I had a few lftp sessions open pulling files. After I executed the check,
> the lftp processes entered 'D' state and I could do 'nothing' in the
> process until the check finished. Is this normal? Should a check block
> all I/O to the device and put the processes writing to a particular device
> in 'D' state until it is finished?
No, that shouldn't happen. The 'check' should notice any other disk
activity and slow down if anything else is happening on the device.
Did the check run to completion? And if so, did the 'lftp' start
working normally again?
Did you look at "cat /proc/mdstat" ?? What sort of speed was the check
running at?
NeilBrown
next prev parent reply other threads:[~2007-03-29 6:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-27 9:59 Software RAID (non-preempt) server blocking question. (2.6.20.4) Justin Piszcz
2007-03-29 6:25 ` Neil Brown [this message]
2007-03-29 8:11 ` Justin Piszcz
2007-03-29 8:56 ` Henrique de Moraes Holschuh
2007-03-29 9:00 ` Justin Piszcz
2007-03-30 4:38 ` Neil Brown
2007-03-30 8:12 ` Justin Piszcz
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