linux-kernel - Re: 3.15rc2 hanging processes on exit.

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Message-ID: <20140422203244.GA30757@redhat.com>
Date:	Tue, 22 Apr 2014 16:32:44 -0400
From:	Dave Jones <davej@...hat.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>
Subject: Re: 3.15rc2 hanging processes on exit.

On Tue, Apr 22, 2014 at 01:17:33PM -0700, Hugh Dickins wrote:
 
 > Your patch looks to me correct and to the point; but I agree that
 > we haven't made a relevant change there recently, so I suppose it
 > comes from a trinity improvement rather than a new bug in 3.15.
 > 
 > (Dave, do you have time to confirm that by running new trinity on 3.14?)

I can give it a shot.

I think perhaps a bigger reason why this might be only just turning up,
is that I now have an upper bound on the number of entries in an iovec
at 256 entries.  So now there's more chance that we'll generate an iovec
that a syscall can actually use instead of us running out of memory
trying to satisfy every entry and constructing a broken iovec struct if
we hit ENOMEM

	Dave

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