linux-kernel - Re: [git pull] vfs pile 2 (automount work)

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Message-ID: <20110116230614.GE22723@ZenIV.linux.org.uk>
Date:	Sun, 16 Jan 2011 23:06:14 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Joachim Eastwood <manabian@...il.com>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [git pull] vfs pile 2 (automount work)

On Sun, Jan 16, 2011 at 09:44:26PM +0000, Al Viro wrote:

> Already fixed.  Actually, taking it out of ifdef would work (the only
> place that actually cares about the value of that sucker is SMP side
> of mntput()), but we are obviously better off just not touching it on
> UP at all - why do pointless work and waste space?
> 
> See the patch upthread.  ->mnt_longterm is SMP-only optimization of
> mntput(); it's there only to free the common case of mntput() from
> cacheline bouncing and on UP it's needed at all.

PS: the patch does survive UP beating.  Could you pull
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6.git/ for-linus ?
There's only one patch at the moment:

Al Viro (1):
      mnt_longterm is there only on SMP

 fs/namespace.c |   31 ++++++++++++++++++++++++-------
 1 files changed, 24 insertions(+), 7 deletions(-)

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