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

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Date:	Wed, 21 Jan 2009 16:17:43 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lin Ming <ming.m.lin@...el.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Christoph Lameter <clameter@...r.sgi.com>
Subject: Re: [patch] SLQB slab allocator

On Wed, Jan 21, 2009 at 03:59:18PM +0100, Ingo Molnar wrote:
> 
> * Nick Piggin <npiggin@...e.de> wrote:
> 
> > +/*
> > + * Management object for a slab cache.
> > + */
> > +struct kmem_cache {
> > +	unsigned long flags;
> > +	int hiwater;		/* LIFO list high watermark */
> > +	int freebatch;		/* LIFO freelist batch flush size */
> > +	int objsize;		/* The size of an object without meta data */
> > +	int offset;		/* Free pointer offset. */
> > +	int objects;		/* Number of objects in slab */
> > +
> > +	int size;		/* The size of an object including meta data */
> > +	int order;		/* Allocation order */
> > +	gfp_t allocflags;	/* gfp flags to use on allocation */
> > +	unsigned int colour_range;	/* range of colour counter */
> > +	unsigned int colour_off;		/* offset per colour */
> > +	void (*ctor)(void *);
> > +
> 
> Mind if i nitpick a bit about minor style issues? Since this is going to 
> be the next Linux SLAB allocator we might as well do it perfectly :-)

Well, let's not get ahead of ourselves :) But it's very appreciated.

I think most if not all of your suggestions are good ones, although
I probably won't convert to ftrace just for the moment.

I'll come up with an incremental patch....

Thanks,
Nick
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