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Date:      Mon, 27 Jul 1998 15:26:58 +0200
From:      Pierre Beyssac <Pierre.Beyssac@hsc.fr>
To:        Karl Denninger <karl@mcs.net>, current@FreeBSD.ORG
Subject:   Re: MMAP problems
Message-ID:  <19980727152658.A24276@mars.hsc.fr>
In-Reply-To: <19980725155148.43084@mcs.net>; from Karl Denninger on Sat, Jul 25, 1998 at 03:51:48PM -0500
References:  <19980725155148.43084@mcs.net>

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On Sat, Jul 25, 1998 at 03:51:48PM -0500, Karl Denninger wrote:
> I believe I have found a rather serious MMAP problem in -CURRENT.
> 
> Diablo (the news system) is the test case; with MMAP enabled it will randomly 
> write exactly one block (512 bytes) of zeros into the article spool files 
> rather than the proper data - its almost like an update via MMAP isn't 

I have seen an extremely similar problem, both on 2.2.6 and -current,
with INN 2.0 configured to use MMAP for the active file. It is
fairly easy to reproduce by doing a "ctlinnd newgroup". After that,
a bunch of zeroes appears in the active file.

I haven't bothered investigating the problem for lack of time
because configuring INN to use read() just works and because I
wasn't sure it was a FreeBSD problem, but I'm ready to do any
testing I can to help fix this.
-- 
Pierre.Beyssac@hsc.fr

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