From: Ingo Oeser <ioe-lkml@rameria.de>
To: linux-kernel@vger.kernel.org
Cc: Florian Weimer <fw@deneb.enyo.de>,
Linus Torvalds <torvalds@osdl.org>,
7eggert@gmx.de, Christoph Lameter <clameter@sgi.com>,
akpm@osdl.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Prezeroing V2 [3/4]: Add support for ZEROED and NOT_ZEROED free maps
Date: Mon, 27 Dec 2004 02:37:46 +0100 [thread overview]
Message-ID: <200412270237.53368.ioe-lkml@rameria.de> (raw)
In-Reply-To: <87llbk63sn.fsf@deneb.enyo.de>
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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 ;-)
Regards
Ingo Oeser
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next prev parent reply other threads:[~2004-12-27 1:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.n0l29ap.1nqg39@ifi.uio.no>
[not found] ` <fa.n04s9ar.17sg3f@ifi.uio.no>
2004-12-24 21:10 ` Prezeroing V2 [3/4]: Add support for ZEROED and NOT_ZEROED free maps Bodo Eggert
2004-12-26 23:02 ` Florian Weimer
2004-12-26 23:12 ` Linus Torvalds
2004-12-26 23:24 ` Florian Weimer
2004-12-27 1:37 ` Ingo Oeser [this message]
2004-12-27 4:33 ` Zwane Mwaikambo
2004-12-27 0:01 ` Chris Wedgwood
2005-01-03 20:30 ` Christoph Lameter
[not found] <B8E391BBE9FE384DAA4C5C003888BE6F02900FBD@scsmsx401.amr.corp.intel.com>
[not found] ` <41C20E3E.3070209@yahoo.com.au>
2004-12-21 19:55 ` Increase page fault rate by prezeroing V1 [0/3]: Overview Christoph Lameter
2004-12-23 19:29 ` Prezeroing V2 [0/3]: Why and When it works Christoph Lameter
2004-12-23 19:33 ` Prezeroing V2 [1/4]: __GFP_ZERO / clear_page() removal Christoph Lameter
2004-12-23 19:34 ` Prezeroing V2 [3/4]: Add support for ZEROED and NOT_ZEROED free maps Christoph Lameter
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