From: David Miller <davem@davemloft.net>
To: clameter@sgi.com
Cc: hugh@veritas.com, James.Bottomley@steeleye.com,
rmk+lkml@arm.linux.org.uk, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Containment measures for slab objects on scatter gather lists
Date: Fri, 29 Jun 2007 02:06:55 -0700 (PDT) [thread overview]
Message-ID: <20070629.020655.35469430.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0706282357540.12146@schroedinger.engr.sgi.com>
From: Christoph Lameter <clameter@sgi.com>
Date: Fri, 29 Jun 2007 00:00:39 -0700 (PDT)
> On Thu, 28 Jun 2007, David Miller wrote:
>
> > Really, it would be great if we could treat kmalloc() objects
> > just like real pages. Everything wants to do I/O on pages
> > but sometimes (like the networking) you have a kmalloc
> > chunk which is technically just a part of a page.
> >
> > The fact that there is no easy way to make this work is
> > frustrating :-)
>
> There is easy way: Allocate a page and just use the first N bytes. You can
> specify the bytes to be used when putting the memory onto the scatter
> gather list. This wastes memory but it works. You have real refcounting
> since you got a real page.
>
> How frequent are these objects?
Every single network packet.
next prev parent reply other threads:[~2007-06-29 9:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-29 4:01 [PATCH] Containment measures for slab objects on scatter gather lists Christoph Lameter
2007-06-29 4:10 ` David Miller
2007-06-29 4:22 ` Christoph Lameter
2007-06-29 4:28 ` David Miller
2007-06-29 4:39 ` Christoph Lameter
2007-06-29 5:06 ` David Miller
2007-06-29 5:24 ` Andrew Morton
2007-06-29 5:37 ` David Miller
2007-06-29 5:45 ` Andrew Morton
2007-06-29 6:51 ` Christoph Lameter
2007-06-29 12:16 ` Alan Cox
2007-06-29 20:45 ` Andrew Morton
2007-06-29 21:14 ` Russell King
2007-06-29 23:11 ` Alan Cox
2007-06-30 7:54 ` Russell King
2007-06-29 22:39 ` Alan Cox
2007-06-29 6:50 ` Christoph Lameter
2007-06-30 8:49 ` Christoph Hellwig
2007-06-29 7:00 ` Christoph Lameter
2007-06-29 9:06 ` David Miller [this message]
2007-06-29 13:04 ` Hugh Dickins
2007-06-29 14:15 ` Christoph Lameter
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