linux-kernel - Re: scsi: fix sense_slab/bio swapping livelock

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Message-ID: <84144f020804070317j4af69036q9801c288ba9ecac4@mail.gmail.com>
Date:	Mon, 7 Apr 2008 13:17:54 +0300
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Boaz Harrosh" <bharrosh@...asas.com>
Cc:	"Hugh Dickins" <hugh@...itas.com>,
	"James Bottomley" <James.Bottomley@...senpartnership.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"FUJITA Tomonori" <fujita.tomonori@....ntt.co.jp>,
	"Jens Axboe" <jens.axboe@...cle.com>,
	"Christoph Lameter" <clameter@....com>,
	"Peter Zijlstra" <a.p.ziljstra@...llo.nl>,
	"Rafael J. Wysocki" <rjw@...k.pl>, mpm@...enic.com,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: scsi: fix sense_slab/bio swapping livelock

Hi Boaz,

On Mon, Apr 7, 2008 at 1:07 PM, Boaz Harrosh <bharrosh@...asas.com> wrote:
>  Please forgive my ignorance, but what is then the difference between kmem_cache_alloc()
>  and kmalloc?

Constructors, user-defined alignment, and tighter object packing.

On Mon, Apr 7, 2008 at 1:07 PM, Boaz Harrosh <bharrosh@...asas.com> wrote:
>  would you not agree that sometimes we want to override that sharing of SLOBs?

To be honest, I really don't quite understand your use-case. But as
far as I can tell, it hasn't never been explicitly guaranteed and most
certainly has not been true since the merging of SLOB and more
recently SLUB.

                Pekka
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