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From: David Howells <dhowells@redhat.com>
In-Reply-To: <51B1FEB1.8040103@hurleysoftware.com>
References: <51B1FEB1.8040103@hurleysoftware.com> <20130606115417.GA520@x4> <51B09A26.3080603@hurleysoftware.com> <20130606143750.GB520@x4>
To: Peter Hurley <peter@hurleysoftware.com>
Cc: dhowells@redhat.com, Markus Trippelsdorf <markus@trippelsdorf.de>,
        linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jslaby@suse.cz>, Mikael Pettersson <mikpe@it.uu.se>
Subject: Re: Strange intermittent EIO error when writing to stdout since v3.8.0
Date: Fri, 07 Jun 2013 20:56:12 +0100
Message-ID: <30721.1370634972@warthog.procyon.org.uk>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 876
Lines: 20

Peter Hurley <peter@hurleysoftware.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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