From: Christoph Lameter <clameter@sgi.com>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Nick Piggin <npiggin@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org
Subject: Re: [patch 2/5] slub: Fallback to kmalloc_large for failing higher order allocs
Date: Thu, 14 Feb 2008 11:10:06 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0802141108530.32613@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20080214140614.GE17641@csn.ul.ie>
On Thu, 14 Feb 2008, Mel Gorman wrote:
> comments with a grain of salt. But, if a kmalloc slab allocation fails and
> it ultimately uses the page allocator, I do not see how calling the page
> allocator directly makes a difference.
The kmalloc slab allocation will use order 3. The allocation for an
individual object via the page allocator only uses order 0. The order 0
alloc will succeed even if memory is extremely fragmented. Its a safety
valve that Nick probably finds important.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-02-14 19:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080214040245.915842795@sgi.com>
[not found] ` <20080214040314.118141086@sgi.com>
2008-02-14 7:07 ` [patch 4/5] slub: Use __GFP_MOVABLE for slabs of HPAGE_SIZE Pekka Enberg
2008-02-14 19:04 ` Christoph Lameter
2008-02-14 8:57 ` Pekka Enberg
2008-02-14 19:07 ` Christoph Lameter
2008-02-14 14:14 ` Mel Gorman
2008-02-14 19:18 ` Christoph Lameter
2008-02-14 20:08 ` Mel Gorman
2008-02-14 20:14 ` Christoph Lameter
2008-02-14 20:25 ` Mel Gorman
2008-02-14 20:32 ` Christoph Lameter
[not found] ` <20080214040313.318658830@sgi.com>
2008-02-14 7:23 ` [patch 1/5] slub: Determine gfpflags once and not every time a slab is allocated Pekka Enberg
2008-02-14 13:55 ` Mel Gorman
[not found] ` <20080214040314.388752493@sgi.com>
2008-02-14 7:14 ` [patch 5/5] slub: Large allocs for other slab sizes that do not fit in order 0 Pekka Enberg
2008-02-14 19:06 ` Christoph Lameter
2008-02-14 8:55 ` Pekka Enberg
[not found] ` <20080214040313.616551392@sgi.com>
2008-02-14 7:04 ` [patch 2/5] slub: Fallback to kmalloc_large for failing higher order allocs Pekka Enberg
2008-02-14 8:56 ` Pekka Enberg
2008-02-14 19:07 ` Christoph Lameter
2008-02-14 14:06 ` Mel Gorman
2008-02-14 19:10 ` Christoph Lameter [this message]
2008-02-14 19:23 ` Pekka Enberg
2008-02-14 19:32 ` Christoph Lameter
2008-02-14 19:47 ` Pekka Enberg
2008-02-14 19:57 ` Christoph Lameter
2008-02-14 20:02 ` Pekka Enberg
2008-02-14 20:08 ` Christoph Lameter
2008-02-14 20:13 ` Pekka Enberg
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Pine.LNX.4.64.0802141108530.32613@schroedinger.engr.sgi.com \
--to=clameter@sgi.com \
--cc=akpm@linux-foundation.org \
--cc=linux-mm@kvack.org \
--cc=mel@csn.ul.ie \
--cc=npiggin@suse.de \
--cc=penberg@cs.helsinki.fi \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).