From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Joachim Eastwood <manabian@gmail.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [git pull] vfs pile 2 (automount work)
Date: Sun, 16 Jan 2011 23:06:14 +0000 [thread overview]
Message-ID: <20110116230614.GE22723@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20110116214426.GD22723@ZenIV.linux.org.uk>
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(-)
prev parent reply other threads:[~2011-01-16 23:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-16 18:57 [git pull] vfs pile 2 (automount work) Al Viro
2011-01-16 21:15 ` Joachim Eastwood
2011-01-16 21:36 ` Al Viro
2011-01-16 22:05 ` Joachim Eastwood
2011-01-16 21:37 ` Linus Torvalds
2011-01-16 21:44 ` Al Viro
2011-01-16 21:57 ` Sedat Dilek
2011-01-16 23:06 ` Al Viro [this message]
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