linux-kernel - Re: [PATCH 0/0] SIGWINCH problem with terminal apps

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Message-ID: <20081006141306.6a1f0a15@lxorguk.ukuu.org.uk>
Date:	Mon, 6 Oct 2008 14:13:06 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Adam Tlałka <atlka@...gda.pl>
Cc:	linux-kernel@...r.kernel.org, torvalds@...l.org
Subject: Re: [PATCH 0/0] SIGWINCH problem with terminal apps

> So as a quick solution I made patches which move mentioned updates
> before kill_pgrp() calls. As I tested modified kernel there is no
> observed effect now. So I send patchs.

NAK - this might happen to make the race miss on your box but it's not a
fix of any kind.

> There are some places where kill_pgrp() call is used and some variable
> is changed after it. It should be considered if this code is always
> working properly or some race scheduler condition exists.

The code was never race free, the scheduler change made the problem show
up more. Later 2.6.27-rc has patches that use the termios lock across
TIOCG/SWINSZ and deal with the problem properly.

Alan
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