From: Matt Mackall <mpm@selenic.com>
To: Andreas Gruenbacher <agruen@suse.de>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/8] lib/sort: Heapsort implementation of sort()
Date: Sun, 27 Feb 2005 13:25:36 -0800 [thread overview]
Message-ID: <20050227212536.GG3120@waste.org> (raw)
In-Reply-To: <200502271417.51654.agruen@suse.de>
On Sun, Feb 27, 2005 at 02:17:51PM +0100, Andreas Gruenbacher wrote:
> Matt,
>
> On Monday 31 January 2005 08:34, Matt Mackall wrote:
> > This patch adds a generic array sorting library routine. This is meant
> > to replace qsort, which has two problem areas for kernel use.
>
> the sort function is broken. When sorting the integer array {1, 2, 3, 4, 5},
> I'm getting {2, 3, 4, 5, 1} as a result. Can you please have a look?
Which kernel? There was an off-by-one for odd array sizes in the
original posted version that was quickly spotted:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.11-rc4/2.6.11-rc4-mm1/broken-out/sort-fix.patch
I've since tested all sizes 1 - 1000 with 100 random arrays each, so
I'm fairly confident it's now fixed.
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2005-02-27 21:25 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-31 7:34 [PATCH 0/8] lib/sort: Add generic sort to lib/ Matt Mackall
2005-01-31 7:34 ` [PATCH 1/8] lib/sort: Heapsort implementation of sort() Matt Mackall
2005-01-31 7:34 ` [PATCH 2/8] lib/sort: Replace qsort in XFS Matt Mackall
2005-01-31 7:35 ` [PATCH 3/8] lib/sort: Replace qsort in NFS ACL code Matt Mackall
2005-01-31 7:35 ` [PATCH 4/8] lib/sort: Kill qsort() Matt Mackall
2005-01-31 7:35 ` [PATCH 5/8] lib/sort: Replace open-coded O(pids**2) bubblesort in cpusets Matt Mackall
2005-01-31 7:35 ` [PATCH 6/8] lib/sort: Replace insertion sort in exception tables Matt Mackall
2005-01-31 7:35 ` [PATCH 7/8] lib/sort: Replace insertion sort in IA64 " Matt Mackall
2005-01-31 7:35 ` [PATCH 8/8] lib/sort: Use generic sort on x86_64 Matt Mackall
2005-01-31 12:02 ` [PATCH 5/8] lib/sort: Replace open-coded O(pids**2) bubblesort in cpusets Paul Jackson
2005-02-01 22:29 ` [PATCH 2/8] lib/sort: Replace qsort in XFS Chris Wedgwood
2005-02-01 22:22 ` Randy.Dunlap
2005-02-02 4:31 ` Zan Lynx
2005-02-02 10:48 ` Herbert Xu
2005-02-01 22:48 ` Matt Mackall
2005-01-31 17:16 ` [PATCH 1/8] lib/sort: Heapsort implementation of sort() Andreas Gruenbacher
2005-01-31 17:30 ` Paulo Marques
2005-02-01 17:54 ` Andreas Gruenbacher
2005-02-01 18:11 ` linux-os
2005-02-01 19:04 ` linux-os
2005-02-01 19:47 ` Andreas Gruenbacher
2005-01-31 19:30 ` Matt Mackall
2005-02-01 17:50 ` Andreas Gruenbacher
2005-02-02 1:00 ` Horst von Brand
2005-02-02 10:50 ` Herbert Xu
2005-02-02 11:14 ` Andreas Gruenbacher
2005-02-03 23:19 ` Junio C Hamano
2005-02-01 2:10 ` Horst von Brand
2005-02-27 13:17 ` Andreas Gruenbacher
2005-02-27 21:25 ` Matt Mackall [this message]
2005-02-27 21:53 ` Andreas Gruenbacher
2005-02-27 22:10 ` Andreas Gruenbacher
2005-03-01 13:23 ` Andreas Gruenbacher
2005-03-01 19:06 ` Christophe Saout
2005-03-01 20:12 ` Matt Mackall
2005-03-01 21:47 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2005-01-31 11:52 Alexey Dobriyan
2005-01-31 16:53 ` Matt Mackall
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