linux-kernel - Re: [PATCH 0/5 -tip] umount

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Message-ID: <20090423213249.GA4814@elte.hu>
Date:	Thu, 23 Apr 2009 23:32:49 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Alessio Igor Bogani <abogani@...ware.it>,
	Jonathan Corbet <corbet@....net>,
	Fr??d??ric Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	LFSDEV <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 0/5 -tip] umount_begin BKL pushdown


* Al Viro <viro@...IV.linux.org.uk> wrote:

> On Thu, Apr 23, 2009 at 09:12:00PM +0200, Alessio Igor Bogani wrote:
> > Push the BKL acquisition from vfs to every specific filesystems
> > with hope that it can be eliminated in a second moment.
> > 
> > The first 4 patches add BKL lock into umount_begin() functions 
> > (for the filesystems that have this handler). The last one 
> > remove lock_kernel()/unlock_kernel() from fs/namespace.c (the 
> > only point that invoke umount_begin() funtcions).
> 
> I'd rather collapse all these patches together; no point doing 
> that per-fs (for all 4 of them).  And CIFS side is bogus.
> 
> Another thing: -tip is no place for that.  I can put that into VFS 
> tree, provided that comments above are dealt with.

When that happens, could you please put it into a separate, 
append-only branch i could pull (after some initial test-time) into 
tip:kill-the-BKL?

Thanks,

	Ingo
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