lkml.org 
[lkml]   [2005]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: SMP syncronization on AMD processors (broken?)
linux@horizon.com wrote:

> The right thing to do here is to wait for the flag to be set *outside*
> the lock, and then re-validate inside the lock:

This may work on some processors, but on others the read of "progress"
in XXX, or the write in YYY may require arch-specific code to force the
update out to other cpus.

Alternately, explicitly atomic operations should suffice, but a simple
increment is probably not enough for portable code.

Chris
-
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: 2005-10-12 04:20    [W:0.026 / U:6.448 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site