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To: Hugh Dickins <hugh@veritas.com>
Cc: Andrew Morton <akpm@digeo.com>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Re: Shared memory shmat/dt not working well in 2.5.x
References: <Pine.LNX.4.44.0210011401360.991-100000@localhost.localdomain>
Reply-To: zlatko.calusic@iskon.hr
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From: Zlatko Calusic <zlatko.calusic@iskon.hr>
Date: Tue, 01 Oct 2002 15:37:28 +0200
In-Reply-To: <Pine.LNX.4.44.0210011401360.991-100000@localhost.localdomain> (Hugh
 Dickins's message of "Tue, 1 Oct 2002 14:09:22 +0100 (BST)")
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Hugh Dickins <hugh@veritas.com> writes:

> On Tue, 1 Oct 2002, Zlatko Calusic wrote:
>> 
>> Still having problems with Oracle on 2.5.x (it can't even be started),
>> I devoted some time trying to pinpoint where the problem is. Reading
>> many traces of Oracle, and rebooting a dozen times, I finally found
>> that the culprit is weird behaviour of shmat/shmdt functions in 2.5,
>> when combined with mprotect() calls. I wrote a simple test app
>> (attached) and I'm also appending output of it below (running on
>> 2.4.19 & 2.5.39 kernels, see the difference).
>
> Exemplary bug report!  Many thanks for taking so much trouble to
> reproduce the problem.  Patch below (against 2.5.39) should fix it:
> I'll send Linus and Andrew when I can get hold of a 2.5.40 tree.

Oh, dear sir, but you are the one who solved it eventually. :)
Anyway, I'm glad it worked well and I was helpful.

Looking forward to test/bench Oracle w/ patch applied (and report
further bugs in ext3, fsync() and friends ;)).

Keep up the good work!
-- 
Zlatko
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