linux-kernel - Re: I/O scheduler on its knees, pvmove hangs other tasks

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Message-ID: <20111001093931.GA22428@albatross.gern.madduck.net>
Date:	Sat, 1 Oct 2011 11:39:31 +0200
From:	martin f krafft <madduck@...duck.net>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: I/O scheduler on its knees, pvmove hangs other tasks

also sprach martin f krafft <madduck@...duck.net> [2011.10.01.1128 +0200]:
> The problem is that the kernel seems not to care. The pvmove process
> happily chugs along at what seems to be maximum speed. At the same
> time, other processes, like /bin/ls simply block and remain in 'D'
> state *forever*. Even after the pvmove process exits, these
> processes do not recover.

Okay, I lied. In a test I just ran, the test process (ls) recovered
after about 10 minutes. It seems that this time increases
exponentially with the number of hung processes though.

-- 
martin | http://madduck.net/ | http://two.sentenc.es/
 
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