From: Andrew Morton <akpm@osdl.org>
To: arjanv@redhat.com
Cc: helgehaf@aitel.hist.no, mpm@selenic.com, linux-kernel@vger.kernel.org
Subject: Re: dentry bloat.
Date: Mon, 10 May 2004 02:46:58 -0700 [thread overview]
Message-ID: <20040510024658.53cb0b80.akpm@osdl.org> (raw)
In-Reply-To: <1084177928.4925.13.camel@laptop.fenrus.com>
Arjan van de Ven <arjanv@redhat.com> wrote:
>
> On Mon, 2004-05-10 at 10:27, Helge Hafting wrote:
> > Matt Mackall wrote:
> >
> > >One also wonders about whether all the RCU stuff is needed on UP. I'm
> > >not sure if I grok all the finepoints here, but it looks like the
> > >answer is no and that we can make struct_rcu head empty and have
> > >call_rcu fall directly through to the callback. This would save
> > >something like 16-32 bytes (32/64bit), not to mention a bunch of
> > >dinking around with lists and whatnot.
> > >
> > >So what am I missing?
> > >
> > >
> > Preempt can happen anytime, I believe.
>
> ok so for UP-non-preempt we can still get those 16 bytes back from the
> dentry....
I suppose so. And on small SMP, really. We chose not to play those games
early on so the code got the best testing coverage.
next prev parent reply other threads:[~2004-05-10 9:47 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040506200027.GC26679@redhat.com>
[not found] ` <20040506150944.126bb409.akpm@osdl.org>
[not found] ` <409B1511.6010500@colorfullife.com>
2004-05-08 8:23 ` dentry bloat Andrew Morton
2004-05-08 9:23 ` Andrew Morton
2004-05-08 10:11 ` Andrew Morton
2004-05-08 10:12 ` Andrew Morton
2004-05-08 10:28 ` viro
2004-05-08 10:41 ` Andrew Morton
2004-05-08 10:52 ` Andrew Morton
2004-05-08 10:31 ` Manfred Spraul
2004-05-08 17:28 ` Linus Torvalds
2004-05-08 18:19 ` David S. Miller
2004-05-08 19:01 ` Andrew Morton
2004-05-08 19:13 ` Linus Torvalds
2004-05-08 19:27 ` Andrew Morton
2004-05-08 19:27 ` Linus Torvalds
2004-05-08 20:42 ` Dipankar Sarma
2004-05-08 20:55 ` Andrew Morton
2004-05-08 21:19 ` Dipankar Sarma
2004-05-09 0:10 ` Andrew Morton
2004-05-09 2:55 ` Linus Torvalds
2004-05-09 3:12 ` David S. Miller
2004-05-09 3:53 ` Linus Torvalds
2004-05-09 21:03 ` Matt Mackall
2004-05-10 8:27 ` Helge Hafting
2004-05-10 8:32 ` Arjan van de Ven
2004-05-10 9:46 ` Andrew Morton [this message]
2004-05-10 14:54 ` Matt Mackall
2004-05-10 16:26 ` Paul E. McKenney
2004-05-10 18:34 ` Dipankar Sarma
2004-05-09 4:12 ` Andrew Morton
2004-05-09 4:25 ` Linus Torvalds
2004-05-09 4:36 ` Andrew Morton
2004-05-09 5:14 ` Linus Torvalds
2004-05-09 7:36 ` Rodolfo Guluarte Hale
2004-05-09 9:10 ` Guennadi Liakhovetski
2004-05-09 9:23 ` viro
2004-05-09 15:35 ` Linus Torvalds
2004-05-09 18:11 ` Matt Mackall
2004-05-09 22:08 ` Francois Romieu
2004-05-09 23:51 ` Paul Jackson
2004-05-10 7:17 ` Florian Weimer
2004-05-10 14:12 ` Rik van Riel
2004-05-09 4:43 ` Linus Torvalds
2004-05-09 7:28 ` Manfred Spraul
2004-05-09 15:33 ` Dipankar Sarma
2004-05-09 22:17 ` viro
2004-05-09 22:27 ` Andrew Morton
2004-05-11 5:26 ` Maneesh Soni
2004-05-10 18:39 ` Dipankar Sarma
2004-05-11 5:17 ` Maneesh Soni
2004-05-08 20:13 ` Dipankar Sarma
2004-10-06 12:58 ` Maneesh Soni
2004-05-11 20:22 ` Andrew Morton
2004-05-14 10:33 ` Raghavan
2004-05-14 10:50 ` Paul Jackson
2004-05-14 11:04 ` Jens Axboe
2004-05-14 11:14 ` Paul Jackson
2004-05-14 11:24 ` Dipankar Sarma
2004-05-14 11:24 ` Jens Axboe
2004-05-14 11:30 ` Paul Jackson
2004-05-14 11:18 ` Dipankar Sarma
2004-05-14 14:44 ` Linus Torvalds
2004-05-08 21:00 ` Dipankar Sarma
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