lkml.org 
[lkml]   [2001]   [Nov]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Using %cr2 to reference "current"
Date
In article <E1613vx-00005r-00@the-village.bc.nu>,
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
>
>It may be. Likewise its not clear if %cr2 should hold current or a cpu ident
>pointer (so you dont reload on switch of task). This needs more
>benchmarking. Its in current -ac to verify the theory is correct not the
>tuning.

We pretty much know the _theory_ is not correct, just by virtue of
depending on non-architected behaviour. The only thing -ac can do is
test whether it works in practice. Which is a totally different thing.

Especially on x86 chips.

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 13:12    [W:0.118 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site