linux-kernel - Re: [patch] SLQB slab allocator

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Message-ID: <alpine.DEB.1.10.0901231041230.32253@qirst.com>
Date:	Fri, 23 Jan 2009 10:42:04 -0500 (EST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
cc:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Nick Piggin <npiggin@...e.de>, Lin Ming <ming.m.lin@...el.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [patch] SLQB slab allocator

On Fri, 23 Jan 2009, Pekka Enberg wrote:

> On Thu, 22 Jan 2009, Pekka Enberg wrote:
> > > That is, a list of pages that could be returned to the page allocator
> > > but are pooled in SLUB to avoid the page allocator overhead. Note that
> > > this will not help allocators that trigger page allocator pass-through.
>
> On Fri, 2009-01-23 at 10:32 -0500, Christoph Lameter wrote:
> > We use the partial list for that.
>
> Even if the slab is totally empty?

The MIN_PARTIAL thingy can keep pages around even if the slab becomes
totally empty in order to avoid page allocator trips.

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