lkml.org 
[lkml]   [2004]   [Dec]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Prezeroing V2 [3/4]: Add support for ZEROED and NOT_ZEROED free maps
On Mon, 27 Dec 2004, Ingo Oeser wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> On Monday 27 December 2004 00:24, Florian Weimer wrote:
> > By the way, some crazy idea that occurred to me: What about
> > incrementally scrubbing a page which has been assigned previously to
> > this CPU, while spinning inside spinlocks (or busy-waiting somewhere
> > else)?
>
> Crazy idea, indeed. spinlocks are like safety belts: You should
> actually not need them in the normal case, but they will save your butt
> and you'll be glad you have them, when they actually trigger.
>
> So if you are making serious progress here, you have just uncovered
> a spinlockcontention problem in the kernel ;-)

You'd also be evicting the cache contents thus making the lock contention
case even worse.
-
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 14:09    [W:0.422 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site