Re: PATCH 2.3.26: kmalloc GFP_ZERO

Jes Sorensen (Jes.Sorensen@cern.ch)
09 Nov 1999 17:17:30 +0100


>>>>> "yodaiken" == yodaiken <yodaiken@chelm.cs.nmt.edu> writes:

yodaiken> On Tue, Nov 09, 1999 at 03:07:12PM +0100, Jes Sorensen
yodaiken> wrote:
Mikulas> to do, it can clear free pages, and when GFP_ZERO request
Mikulas> comes, it returns page directly without clearing overhead.
>> Which I doubt is a win anyway, all you do is to sit there and
>> thrash your cache in the background.

yodaiken> PPC turns cache off and zeros during idle task. This is a
yodaiken> major performance win. We measured.

And Jakub just told us it wasn't a win under the same conditions on
the Sparc64.

Jes

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/