lkml.org 
[lkml]   [2007]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [BUGFIX][PATCH] DO flush icache before set_pte() on ia64.
On Fri, 6 Jul 2007 10:32:29 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> I am a bit worried about the performance impact of all this flushing? What
> is the worst case scenario here?
>

IMHO....
When a user set VM_EXEC to their anonymous memory intentionally and
does many page faults.

I myself don't think (file's) page cache flushing is not so heavy work because
PG_arch_1 guarantees that icache flushing occurs just once at the first
read in the system.

Thanks,
-Kame

-
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: 2007-07-07 00:01    [W:0.187 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site