linux-kernel - Re: Major regression on hackbench with SLUB (more numbers)

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Message-ID: <5a4c581d0712231959n3141f535kd8182dc93bc2509d@mail.gmail.com>
Date:	Mon, 24 Dec 2007 04:59:13 +0100
From:	"Alessandro Suardi" <alessandro.suardi@...il.com>
To:	"Jason L Tibbitts III" <tibbs@...h.uh.edu>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Christoph Lameter" <clameter@....com>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Steven Rostedt" <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Christoph Hellwig" <hch@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Major regression on hackbench with SLUB (more numbers)

On 22 Dec 2007 16:52:56 -0600, Jason L Tibbitts III <tibbs@...h.uh.edu> wrote:
> >>>>> "IM" == Ingo Molnar <mingo@...e.hu> writes:
>
> IM> Distros will likely pick SLUB if there's no performance worries
> IM> and if it's the default. Fedora rawhide already uses SLUB.
>
> Actually, it seems to me that not only does Fedora rawhide use SLUB,
> but Fedora 8 and 7 use it as well.  They don't have /proc/slabinfo and
> they all seem to have CONFIG_SLUB=y:
>
> > grep -r CONFIG_SLUB=y kernel
> kernel/devel/config-generic:CONFIG_SLUB=y
> kernel/F-7/configs/config-generic:CONFIG_SLUB=y
> kernel/F-8/config-generic:CONFIG_SLUB=y

Also true for at least recent versions of FC6 (which my bittorrent
 machine is still on), which currently run 2.6.22-14 based kernels.
And no, I didn't notice - that box usually hits triple-digit uptime
 before I reboot; in fact, it's still running a 2.6.22-9 based kernel.

--alessandro

 "Damaged people are dangerous. They know they can survive."

   (Anna Barton/Juliette Binoche, 'Damage')
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