From: Neil Brown <neilb@suse.de>
To: "Matt Proud" <matt.proud.list@gmail.com>
Cc: nfs@lists.sourceforge.net
Subject: Re: Possible causes for rpc.mountd consuming 100 percent CPU.
Date: Mon, 5 Mar 2007 13:05:21 +1100 [thread overview]
Message-ID: <17899.31457.535979.478100@notabene.brown> (raw)
In-Reply-To: message from Matt Proud on Sunday March 4
On Sunday March 4, matt.proud.list@gmail.com wrote:
>
> When rpc.mountd acts funny, an attached strace reveals the a select
> function call occurring very rapidly:
>
> select(1024, [3 4 5 6 7 32 33 34 35 36 37 38 39 40], NULL, NULL, NULL)
> = 9 (in [32 33 34 35 36 37 38 39 40])
It would help if we could see matching "lsof -p xxx" output to see
exactly what those 9 fds are, but they are presumably tcp connections.
I cannot imagine why mountd would spin on something like that - if
select says that it can read from those fds, it should try to read...
It might be worth trying a newer nfs-utils. Just grab
1.0.12 from
http://www.kernel.org/pub/linux/utils/nfs/
./configure --without-nfsv4 --without-gss
make
then kill mountd and run ./utils/mountd/mountd
See if that makes a difference.
NeilBrown
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next prev parent reply other threads:[~2007-03-05 2:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-05 1:47 Possible causes for rpc.mountd consuming 100 percent CPU Matt Proud
2007-03-05 2:05 ` Neil Brown [this message]
2007-03-05 2:12 ` Matt Proud
2007-03-05 3:07 ` Neil Brown
2007-03-05 3:25 ` Neil Brown
2007-03-05 4:10 ` Neil Brown
[not found] ` <a6a251db0703042017l60a872f7ve93038b169a52968@mail.gmail.com>
[not found] ` <17899.39862.202935.678726@notabene.brown>
2007-03-05 4:32 ` Matt Proud
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