linux-kernel - Re: [PATCH 01/45] Create a dynamically sized pool of threads for doing very slow work items [ver #41]

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Message-Id: <20081121000913.6506d7b6.akpm@linux-foundation.org>
Date:	Fri, 21 Nov 2008 00:09:13 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Howells <dhowells@...hat.com>
Cc:	trond.myklebust@....uio.no, viro@...IV.linux.org.uk,
	nfsv4@...ux-nfs.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 01/45] Create a dynamically sized pool of threads for
 doing very slow work items [ver #41]

On Thu, 20 Nov 2008 14:41:45 +0000 David Howells <dhowells@...hat.com> wrote:

> Create a dynamically sized pool of threads for doing very slow work items, such
> as invoking mkdir() or rmdir() - things that may take a long time and may
> sleep, holding mutexes/semaphores and hogging a thread, and are thus unsuitable
> for workqueues.

umm, if they're slow, why not create a kernel thread per operation? 
Why add the thread pool?

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