linux-kernel - Re: [PATCH] Remove BKL from fs/locks.c

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Message-Id: <201009142324.16074.arnd@arndb.de>
Date:	Tue, 14 Sep 2010 23:24:15 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Matthew Wilcox <willy@...ux.intel.com>,
	Christoph Hellwig <hch@....de>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, John Kacur <jkacur@...hat.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] Remove BKL from fs/locks.c

On Tuesday 14 September 2010 22:53:31 Linus Torvalds wrote:
> Oh well. I guess there's no incremental way to do things sanely. And
> nobody has patches to fix those users, I guess.

The only critical user is fs/lockd, I can easily handle the rest.
When I talked to Bruce and Trond during LinuxCon, they told me that
it should be possible to separate the bits of fs/lockd that lock
against fs/locks.c and convert the former to use lock_flocks().

That would be enough to actually apply this patch without the
nasty CONFIG_BKL check and with changes to the few other
consumers of file locks. My original plan was to have my current
patch in -next until that happens.

	Arnd
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