linux-kernel - Re: [Jfs-discussion] Unneeded kernel threads (xfs, jfs, gfs2)

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Message-ID: <20080513092156.GA26736@infradead.org>
Date:	Tue, 13 May 2008 05:21:56 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	David Chinner <dgc@....com>
Cc:	Georgi Chorbadzhiyski <gf@...xsol.org>, cluster-devel@...hat.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jfs-discussion@...ts.sourceforge.net,
	Donald Douwsma <donaldd@....com>, xfs@....sgi.com
Subject: Re: [Jfs-discussion] Unneeded kernel threads (xfs, jfs, gfs2)

On Tue, May 13, 2008 at 07:03:11PM +1000, David Chinner wrote:
> Sure - XFS will start another three kernel threads per filesystem
> that gets mounted. And for good measure, it cleans them up again
> on unmount. :)
> 
> The other threads are per-cpu workqueue threads that are shared
> across all XFS filesystems in the system and hence are started
> when XFS is initialised rather than when a mount occurs.

Well, we could refcount the number of active xfs instances and
start/stop the global threads based on that.  Not really worth my
time IHMO, but if someone comes up with a clean enough patch it should
go in.
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