Re: SLUB performance regression vs SLAB

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To: <arjan@...>
Cc: <clameter@...>, <willy@...>, <nickpiggin@...>, <hch@...>, <mel@...>, <linux-fsdevel@...>, <linux-kernel@...>, <dgc@...>, <jens.axboe@...>
Date: Thursday, October 4, 2007 - 4:48 pm

From: Arjan van de Ven <arjan@infradead.org>
Date: Thu, 4 Oct 2007 10:50:46 -0700


I think this is partly Christoph subconsciously venting his
frustration that he's never given a reproducable test case he can use
to fix the problem.

There comes a point where it is the reporter's responsibility to help
the developer come up with a publishable test case the developer can
use to work on fixing the problem and help ensure it stays fixed.

Using an unpublishable benchmark, whose results even cannot be
published, really stretches the limits of "reasonable" don't you
think?

This "SLUB isn't ready yet" bullshit is just a shamans dance which
distracts attention away from the real problem, which is that a
reproducable, publishable test case, is not being provided to the
developer so he can work on fixing the problem.

I can tell you this thing would be fixed overnight if a proper test
case had been provided by now.
-
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Messages in current thread:
[15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Tue Sep 18, 11:36 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Fri Sep 28, 1:33 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 4:50 pm)
SLUB performance regression vs SLAB, Matthew Wilcox, (Thu Oct 4, 12:16 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 1:38 pm)
Re: SLUB performance regression vs SLAB, Arjan van de Ven, (Thu Oct 4, 1:50 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Thu Oct 4, 4:48 pm)
RE: SLUB performance regression vs SLAB, David Schwartz, (Thu Oct 4, 7:39 pm)
Re: SLUB performance regression vs SLAB, Chuck Ebbert, (Thu Oct 4, 7:49 pm)
RE: SLUB performance regression vs SLAB, David Schwartz, (Fri Oct 5, 12:18 am)
Re: SLUB performance regression vs SLAB, Matthew Wilcox, (Thu Oct 4, 4:58 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 5:11 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Thu Oct 4, 5:05 pm)
Re: SLUB performance regression vs SLAB, Peter Zijlstra, (Thu Oct 4, 2:26 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 1:58 pm)
Re: SLUB performance regression vs SLAB, Matthew Wilcox, (Thu Oct 4, 2:32 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 1:49 pm)
Re: SLUB performance regression vs SLAB, Matthew Wilcox, (Thu Oct 4, 3:28 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Thu Oct 4, 4:55 pm)
Re: SLUB performance regression vs SLAB, Chuck Ebbert, (Thu Oct 4, 5:02 pm)
Re: SLUB performance regression vs SLAB, Peter Zijlstra, (Fri Oct 5, 4:32 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Fri Oct 5, 5:31 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Thu Oct 4, 5:11 pm)
Re: SLUB performance regression vs SLAB, Chuck Ebbert, (Thu Oct 4, 5:47 pm)
Re: SLUB performance regression vs SLAB, David Miller, (Thu Oct 4, 6:07 pm)
Re: SLUB performance regression vs SLAB, David Chinner, (Thu Oct 4, 6:23 pm)
Re: SLUB performance regression vs SLAB, Jens Axboe, (Fri Oct 5, 2:48 am)
Re: SLUB performance regression vs SLAB, Matthew Wilcox, (Fri Oct 5, 7:56 am)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Fri Oct 5, 3:27 pm)
Re: SLUB performance regression vs SLAB, Jens Axboe, (Fri Oct 5, 8:37 am)
Re: SLUB performance regression vs SLAB, Pekka Enberg, (Fri Oct 5, 5:19 am)
Re: SLUB performance regression vs SLAB, Jens Axboe, (Fri Oct 5, 5:28 am)
Re: SLUB performance regression vs SLAB, Andi Kleen, (Fri Oct 5, 7:12 am)
Re: SLUB performance regression vs SLAB, Jens Axboe, (Fri Oct 5, 8:39 am)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Fri Oct 5, 3:31 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Fri Oct 5, 3:32 pm)
Re: SLUB performance regression vs SLAB, Matthew Wilcox, (Thu Oct 4, 5:05 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 10:43 pm)
Re: SLUB performance regression vs SLAB, Arjan van de Ven, (Thu Oct 4, 10:53 pm)
Re: SLUB performance regression vs SLAB, Christoph Lameter, (Thu Oct 4, 3:05 pm)
Re: SLUB performance regression vs SLAB, Siddha, Suresh B, (Thu Oct 4, 3:46 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 5:10 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Fri Sep 28, 2:20 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 5:01 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 4:55 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 5:38 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Mon Oct 1, 5:52 pm)
Re: [15/17] SLUB: Support virtual fallback via SLAB_VFALLBACK, Christoph Lameter, (Fri Sep 28, 2:41 pm)