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From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Christoph Lameter <cl@linux-foundation.org>
Subject: Re: [patch] SLQB slab allocator
Date: Thu, 5 Feb 2009 14:14:38 +1100
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Cc: Pekka Enberg <penberg@cs.helsinki.fi>, Nick Piggin <npiggin@suse.de>,
       "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
       Lin Ming <ming.m.lin@intel.com>, linux-mm@kvack.org,
       linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>
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On Thursday 05 February 2009 07:10:31 Christoph Lameter wrote:
> On Tue, 3 Feb 2009, Pekka Enberg wrote:
> > Well, the slab_hiwater() check in __slab_free() of mm/slqb.c will cap
> > the size of the queue. But we do the same thing in SLAB with
> > alien->limit in cache_free_alien() and ac->limit in __cache_free(). So
> > I'm not sure what you mean when you say that the queues will "grow
> > unconstrained" (in either of the allocators). Hmm?
>
> Nick said he wanted to defer queue processing. If the water marks are
> checked and queue processing run then of course queue processing is not
> deferred and the queue does not build up further.

I don't think I ever said anything as ambiguous as "queue processing".
This subthread was started by your concern of periodic queue trimming,
and I was definitely talking about the possibility to defer *that*.