lkml.org 
[lkml]   [2001]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Lse-tech] Re: RFC: patch to allow lock-free traversal of lists with insertion

On Fri, 12 Oct 2001, Davide Libenzi wrote:
>
> The problem is that even if cpu1 schedule the load of p before the
> load of *p and cpu2 does a = 1; wmb(); p = &a; , it could happen that
> even if from cpu2 the invalidation stream exit in order, cpu1 could see
> the value of p before the value of *p due a reordering done by the
> cache controller delivering the stream to cpu1.

Umm - if that happens, your cache controller isn't honouring the wmb(),
and you have problems quite regardless of any load ordering on _any_ CPU.

Ehh?

Linus

-
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: 2005-03-22 13:08    [W:0.064 / U:1.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site