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Date: Mon, 12 Nov 2012 13:41:21 -0800 (PST)
From: David Rientjes <rientjes@google.com>
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To: "Artem S. Tashkinov" <t.artem@lycos.com>
cc: linux-kernel@vger.kernel.org, dave@gnu.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: OOM changes in Linux 3.7 lead to udev warnings and total breakage
 of KDE 3.5.10/TDE
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On Mon, 12 Nov 2012, Artem S. Tashkinov wrote:

> Hello,
> 
> If I remember correctly kernel developers promised not to break user APIs in the Linux kernel
> however in Linux 3.7 a /proc/<PID>/oom_adj file has been totally removed which makes KDE 3.5.x
> (and I suppose TDE) unusable as they depend on this file and simply refuse to start in its absence.
> 

This is 
http://mail.kde.org/pipermail/unassigned-bugs/2010-December/016850.html 
from almost two years ago.  The tunable had been on the feature removal 
schedule for two years and would have emitted a warning if you had run on 
any kernel during that time.  KDE 4.6.1 and later from two years ago work 
fine.

> Also, udev in CentOS/RHEL/Scientific and other old Linux'es depend on this file (which is not critical
> but not pleasant anyway).
> 

Fixed in udev v162 at the same time kde was.
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