linux-kernel - Re: [2.6.27.24] Kernel coredump to a pipe is failing

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Message-Id: <20090526172935.fad52c49.akpm@linux-foundation.org>
Date:	Tue, 26 May 2009 17:29:35 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	paul@...-scientist.net, linux-kernel@...r.kernel.org
Subject: Re: [2.6.27.24] Kernel coredump to a pipe is failing

On Wed, 27 May 2009 02:11:04 +0200 Andi Kleen <andi@...stfloor.org> wrote:

> > I dunno.  Is this true of all linux filesystems in all cases?  Maybe.
> 
> Assuming one of them is not would you rather want to fix that file system
> or 10 zillion user programs (including the kernel core dumper) that 
> get it wrong? @)
> 

I think that removing one bug is better than adding one.

Many filesystems will return a short write if they hit a memory
allocation failure, for example.  pipe_write() sure will.  Retrying
is appropriate in such a case.

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