linux-kernel - Re: Strange intermittent EIO error when writing to stdout since v3.8.0

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Message-ID: <30721.1370634972@warthog.procyon.org.uk>
Date:	Fri, 07 Jun 2013 20:56:12 +0100
From:	David Howells <dhowells@...hat.com>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	dhowells@...hat.com, Markus Trippelsdorf <markus@...ppelsdorf.de>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, Mikael Pettersson <mikpe@...uu.se>
Subject: Re: Strange intermittent EIO error when writing to stdout since v3.8.0

Peter Hurley <peter@...leysoftware.com> wrote:

> Based on the other reports from Mikael and David, I suspect this problem
> may have to do with my commit 699390354da6c258b65bf8fa79cfd5feaede50b6:
> 
>   pty: Ignore slave pty close() if never successfully opened
> 
> This commit poisons the pty under certain error conditions that may
> occur from parallel open()s (or parallel close() with pending write()).

In the case that I'm seeing, the tty in question isn't being opened and closed
regularly.  A gcc build is dumping a load of stuff out through tee and tee
writes it to the tty it got as fd 1 from the parent shell.

David
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