lkml.org 
[lkml]   [2007]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/24] make atomic_read() behave consistently across all architectures
Linus Torvalds wrote:
> So the only reason to add back "volatile" to the atomic_read() sequence is
> not to fix bugs, but to _hide_ the bugs better. They're still there, they
> are just a lot harder to trigger, and tend to be a lot subtler.

What about barrier removal? With consistent semantics we could optimize a fair
amount of code. Whether or not that constitutes "premature" optimization is
open to debate, but there's no question we could reduce our register wiping in
some places.

-- 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: 2007-08-20 15:19    [W:0.357 / U:2.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site