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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