lkml.org 
[lkml]   [2010]   [Aug]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] netfilter: save the hash of the tuple in the original direction for latter use
On Tue, Aug 17, 2010 at 5:01 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
>
> I am not sure we must use a long (we really need 4 bytes only), and last
> time I tried to use cmpxchg(), I was being told it was not available on
> all arches.
>
> But seeing it used in kernel/pid.c, maybe its not true anymore (that is,
> __HAVE_ARCH_CMPXCHG is always defined to 1)
>
> Since its a recent change (in kernel/pid.c), I would wait a bit and see
> if an arch maintainer complains ;)
>
>

I searched the code, and found ext4, btrfs, lockdep, perf and trace
all use cmpxchg(). And after this patch serial
(http://linux.derkeiler.com/Mailing-Lists/Kernel/2007-08/msg05032.html)
was merged, maybe cmpxchg() is generic. Is there an SMP processor
doesn't support cmpxchg()?

--
Regards,
Changli Gao(xiaosuo@gmail.com)


\
 
 \ /
  Last update: 2010-08-19 06:03    [W:0.153 / U:1.480 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site