lkml.org 
[lkml]   [2007]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 01/23] Fall back on interrupt disable in cmpxchg8b on 80386 and 80486
On Mon, 20 Aug 2007, Mathieu Desnoyers wrote:

> already present in cmpxchg_386_u32 tells much about how this cmpxchg
> implementation should not be used in a SMP context. However, the cmpxchg_local
> can perfectly use this fallback, since it only needs to be atomic wrt the local
> cpu.

Do you have an example where the use of cmpxchg_local is a performance
benefit when actually used in code? cmpxchg is already problematic
functionality since it is not available on all platforms.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-20 22:57    [W:0.179 / U:2.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site