From: Matt Mackall <mpm@selenic.com>
To: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
linux-mm@kvack.org, Christoph Lameter <cl@linux-foundation.org>,
linux-kernel@vger.kernel.org, Nick Piggin <npiggin@suse.de>
Subject: Re: lockdep complaints in slab allocator
Date: Wed, 25 Nov 2009 17:06:47 -0600 [thread overview]
Message-ID: <1259190407.2858.61.camel@calx> (raw)
In-Reply-To: <alpine.DEB.2.00.0911251356130.11347@chino.kir.corp.google.com>
On Wed, 2009-11-25 at 13:59 -0800, David Rientjes wrote:
> On Tue, 24 Nov 2009, Matt Mackall wrote:
>
> > I'm afraid I have only anecdotal reports from SLOB users, and embedded
> > folks are notorious for lack of feedback, but I only need a few people
> > to tell me they're shipping 100k units/mo to be confident that SLOB is
> > in use in millions of devices.
> >
>
> It's much more popular than I had expected; do you think it would be
> possible to merge slob's core into another allocator or will it require
> seperation forever?
Probably not. It's actually a completely different kind of allocator
than the rest as it doesn't actually use "slabs" at all. It's instead a
slab-like interface on a traditional heap allocator. SLAB/SLUB/SLQB have
much more in common - their biggest differences are about their approach
to scalability/locking issues.
On the upside, SLOB is easily the simplest of the bunch.
--
http://selenic.com : development and support for Mercurial and Linux
WARNING: multiple messages have this Message-ID (diff)
From: Matt Mackall <mpm@selenic.com>
To: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
linux-mm@kvack.org, Christoph Lameter <cl@linux-foundation.org>,
linux-kernel@vger.kernel.org, Nick Piggin <npiggin@suse.de>
Subject: Re: lockdep complaints in slab allocator
Date: Wed, 25 Nov 2009 17:06:47 -0600 [thread overview]
Message-ID: <1259190407.2858.61.camel@calx> (raw)
In-Reply-To: <alpine.DEB.2.00.0911251356130.11347@chino.kir.corp.google.com>
On Wed, 2009-11-25 at 13:59 -0800, David Rientjes wrote:
> On Tue, 24 Nov 2009, Matt Mackall wrote:
>
> > I'm afraid I have only anecdotal reports from SLOB users, and embedded
> > folks are notorious for lack of feedback, but I only need a few people
> > to tell me they're shipping 100k units/mo to be confident that SLOB is
> > in use in millions of devices.
> >
>
> It's much more popular than I had expected; do you think it would be
> possible to merge slob's core into another allocator or will it require
> seperation forever?
Probably not. It's actually a completely different kind of allocator
than the rest as it doesn't actually use "slabs" at all. It's instead a
slab-like interface on a traditional heap allocator. SLAB/SLUB/SLQB have
much more in common - their biggest differences are about their approach
to scalability/locking issues.
On the upside, SLOB is easily the simplest of the bunch.
--
http://selenic.com : development and support for Mercurial and Linux
--
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:[~2009-11-25 23:10 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-18 18:12 lockdep complaints in slab allocator Paul E. McKenney
2009-11-20 6:49 ` Pekka Enberg
2009-11-20 6:49 ` Pekka Enberg
2009-11-20 9:25 ` Peter Zijlstra
2009-11-20 9:25 ` Peter Zijlstra
2009-11-20 10:38 ` Pekka Enberg
2009-11-20 10:38 ` Pekka Enberg
2009-11-20 10:52 ` Peter Zijlstra
2009-11-20 10:52 ` Peter Zijlstra
2009-11-20 11:05 ` Pekka Enberg
2009-11-20 11:05 ` Pekka Enberg
2009-11-20 14:48 ` Paul E. McKenney
2009-11-20 14:48 ` Paul E. McKenney
2009-11-20 15:17 ` Peter Zijlstra
2009-11-20 15:17 ` Peter Zijlstra
2009-11-20 16:25 ` Paul E. McKenney
2009-11-20 16:25 ` Paul E. McKenney
2009-11-20 15:09 ` Peter Zijlstra
2009-11-20 15:09 ` Peter Zijlstra
2009-11-23 19:00 ` Pekka Enberg
2009-11-23 19:00 ` Pekka Enberg
2009-11-23 19:10 ` Matt Mackall
2009-11-23 19:10 ` Matt Mackall
2009-11-23 19:13 ` Pekka Enberg
2009-11-23 19:13 ` Pekka Enberg
2009-11-24 16:33 ` Peter Zijlstra
2009-11-24 16:33 ` Peter Zijlstra
2009-11-24 17:00 ` Paul E. McKenney
2009-11-24 17:00 ` Paul E. McKenney
2009-11-24 17:12 ` Matt Mackall
2009-11-24 17:12 ` Matt Mackall
2009-11-24 17:58 ` Paul E. McKenney
2009-11-24 17:58 ` Paul E. McKenney
2009-11-24 18:14 ` Peter Zijlstra
2009-11-24 18:14 ` Peter Zijlstra
2009-11-24 18:25 ` Paul E. McKenney
2009-11-24 18:25 ` Paul E. McKenney
2009-11-24 18:31 ` Peter Zijlstra
2009-11-24 18:31 ` Peter Zijlstra
2009-11-24 18:53 ` Christoph Lameter
2009-11-24 18:53 ` Christoph Lameter
2009-11-24 18:54 ` Paul E. McKenney
2009-11-24 18:54 ` Paul E. McKenney
2009-11-24 19:23 ` Matt Mackall
2009-11-24 19:23 ` Matt Mackall
2009-11-24 19:50 ` Paul E. McKenney
2009-11-24 19:50 ` Paul E. McKenney
2009-11-24 20:46 ` Peter Zijlstra
2009-11-24 20:46 ` Peter Zijlstra
2009-11-24 20:53 ` Matt Mackall
2009-11-24 20:53 ` Matt Mackall
2009-11-24 21:01 ` Peter Zijlstra
2009-11-24 21:01 ` Peter Zijlstra
2009-11-24 21:03 ` David Rientjes
2009-11-24 21:03 ` David Rientjes
2009-11-24 21:12 ` Peter Zijlstra
2009-11-24 21:12 ` Peter Zijlstra
2009-11-24 21:19 ` Pekka Enberg
2009-11-24 21:19 ` Pekka Enberg
2009-11-24 21:22 ` David Rientjes
2009-11-24 21:22 ` David Rientjes
2009-11-24 21:35 ` Peter Zijlstra
2009-11-24 21:35 ` Peter Zijlstra
2009-11-24 21:46 ` David Rientjes
2009-11-24 21:46 ` David Rientjes
2009-11-24 22:23 ` Paul E. McKenney
2009-11-24 22:23 ` Paul E. McKenney
2009-11-25 7:12 ` Pekka Enberg
2009-11-25 7:12 ` Pekka Enberg
2009-11-25 7:25 ` Pekka Enberg
2009-11-25 7:25 ` Pekka Enberg
2009-11-27 17:22 ` Christoph Lameter
2009-11-27 17:22 ` Christoph Lameter
2009-11-24 21:48 ` Paul E. McKenney
2009-11-24 21:48 ` Paul E. McKenney
2009-11-24 21:16 ` Pekka Enberg
2009-11-24 21:16 ` Pekka Enberg
2009-11-24 21:07 ` Pekka Enberg
2009-11-24 21:07 ` Pekka Enberg
2009-11-24 22:55 ` Matt Mackall
2009-11-24 22:55 ` Matt Mackall
2009-11-25 21:59 ` David Rientjes
2009-11-25 21:59 ` David Rientjes
2009-11-25 23:06 ` Matt Mackall [this message]
2009-11-25 23:06 ` Matt Mackall
2009-11-27 17:28 ` Christoph Lameter
2009-11-27 17:28 ` Christoph Lameter
2009-11-30 23:14 ` David Rientjes
2009-11-30 23:14 ` David Rientjes
2009-12-01 0:21 ` Matt Mackall
2009-12-01 0:21 ` Matt Mackall
2009-12-01 22:41 ` David Rientjes
2009-12-01 22:41 ` David Rientjes
2009-12-01 16:47 ` Christoph Lameter
2009-12-01 16:47 ` Christoph Lameter
2009-11-27 17:26 ` Christoph Lameter
2009-11-27 17:26 ` Christoph Lameter
2009-11-23 19:30 ` Christoph Lameter
2009-11-23 19:30 ` Christoph Lameter
2009-11-23 19:43 ` Paul E. McKenney
2009-11-23 19:43 ` Paul E. McKenney
2009-11-23 19:50 ` Pekka Enberg
2009-11-23 19:50 ` Pekka Enberg
2009-11-23 20:01 ` Pekka Enberg
2009-11-23 20:01 ` Pekka Enberg
2009-11-23 20:57 ` Paul E. McKenney
2009-11-23 20:57 ` Paul E. McKenney
2009-11-23 21:01 ` Matt Mackall
2009-11-23 21:01 ` Matt Mackall
2009-11-24 16:23 ` Paul E. McKenney
2009-11-24 16:23 ` Paul E. McKenney
2009-11-24 20:59 ` Pekka Enberg
2009-11-24 20:59 ` Pekka Enberg
2009-11-24 21:26 ` Peter Zijlstra
2009-11-24 21:26 ` Peter Zijlstra
2009-11-25 10:42 ` Pekka Enberg
2009-11-25 10:42 ` Pekka Enberg
2009-11-24 21:47 ` Paul E. McKenney
2009-11-24 21:47 ` Paul E. McKenney
2009-11-30 16:18 ` Paul E. McKenney
2009-11-30 16:18 ` Paul E. McKenney
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=1259190407.2858.61.camel@calx \
--to=mpm@selenic.com \
--cc=cl@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=npiggin@suse.de \
--cc=paulmck@linux.vnet.ibm.com \
--cc=penberg@cs.helsinki.fi \
--cc=peterz@infradead.org \
--cc=rientjes@google.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.