linux-kernel - Re: [PATCH 2/4] ipc/mqueue: switch back to using non-max values on create

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Date:	Wed, 26 Oct 2011 11:36:20 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	dledford@...hat.com
CC:	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, joe.korty@...r.com, amwang@...hat.com
Subject: Re: [PATCH 2/4] ipc/mqueue: switch back to using non-max values on
 create

> NAK.
> 
> Commit b231cca is 3 years old commit. It's too late to revert.
> Moreover Commit b231cca changed hardcoded limit to kernel knob,
> and this patch do reverse. Of course, latter direction changes almost
> always bring us compatibility issue.
> 
>    commit b231cca4381ee15ec99afbfb244fbc0324869927
>    Author: Joe Korty <joe.korty@...r.com>
>    Date:   Sat Oct 18 20:28:32 2008 -0700
> 
>        message queues: increase range limits
> 
> The right way is to create new knob likes mqueue/msgsize_default
> and to separate default and maximum value.

I discussed with Doug a little. OK, I probably understand his motivation.
Now, I ack this series with a few reservation.

I'll post a few incremental patches for resolving compatibility issue.
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