linux-kernel - Re: [PATCH] coredump: Retry writes where appropriate

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Message-ID: <20090531173144.0a552386@lxorguk.ukuu.org.uk>
Date:	Sun, 31 May 2009 17:31:44 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Olivier Galibert <galibert@...ox.com>
Cc:	paul@...-scientist.net, linux-kernel@...r.kernel.org,
	stable@...nel.org, Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Roland McGrath <roland@...hat.com>
Subject: Re: [PATCH] coredump: Retry writes where appropriate

O> Perhaps removing the "|| r == -EINTR" part would make both of you
> happy?  He gets the reliability on pipes, you keep the interrupt on
> signals.

How does that improve things.

There is a second problem anyway. Suppose something is causing a
continual stream of signal events - what guarantees it makes progress ?

The only source of signals during a dump should be external ones. Far
better would be to set some kind of defined signal mask during the dump
(say SIGPIPE, SIGINT, SIGQUIT) ? I agree with Paul's patch in the sense
we don't want spurious SIGIO events or similar spoiling a dump.

Alan
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