From: Asdo <asdo@shiftmail.org>
To: Jim Duchek <jim.duchek@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Array 'freezes' for some time after large writes?
Date: Wed, 31 Mar 2010 18:37:42 +0200 [thread overview]
Message-ID: <4BB37A56.80008@shiftmail.org> (raw)
In-Reply-To: <dead81ad1003301007h4015ac57x99f36d232bb705b6@mail.gmail.com>
Jim Duchek wrote:
> Hi all. Regularly after a large write to the disk (untarring a very
> large file, etc), my RAID5 will 'freeze' for a period of time --
> perhaps around a minute. My system is completely responsive otherwise
> during this time,
Why don't you
cat /proc/<pid of blocked process>/stack
to see what was the process doing?
Maybe more than once to see if it hangs always on the same syscalls...
I believe this is more useful if there is only 1 access to the array,
not concurrent access. You need to freeze it with e.g. the tar only,
This might identify filesystem problems. Other problems might be more
difficult.
prev parent reply other threads:[~2010-03-31 16:37 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-30 17:07 Array 'freezes' for some time after large writes? Jim Duchek
2010-03-30 17:18 ` Mark Knecht
2010-03-30 17:47 ` Jim Duchek
2010-03-30 18:00 ` Mark Knecht
2010-03-30 18:05 ` Mark Knecht
2010-03-30 20:32 ` Jim Duchek
2010-03-30 20:45 ` Mark Knecht
2010-03-30 20:59 ` Jim Duchek
2010-03-30 22:21 ` Mark Knecht
2010-03-30 23:50 ` Mark Knecht
2010-03-31 0:22 ` Jim Duchek
2010-03-31 1:35 ` Roger Heflin
2010-03-31 16:12 ` Mark Knecht
2010-03-31 16:25 ` Jim Duchek
2010-03-31 16:37 ` Asdo [this message]
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