netdev - RE: [PATCH v2 net-next] af_unix: fix a fatal race with bit fields

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Message-ID: <1367424059.11020.61.camel@edumazet-glaptop>
Date:	Wed, 01 May 2013 09:00:59 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	David Miller <davem@...emloft.net>, benh@...nel.crashing.org,
	netdev@...r.kernel.org, paulus@...ba.org, ambrose@...gle.com,
	linuxppc-dev@...ts.ozlabs.org
Subject: RE: [PATCH v2 net-next] af_unix: fix a fatal race with bit fields

On Wed, 2013-05-01 at 16:53 +0100, David Laight wrote:
> Why not just change gc_candidate and gc_maybe_cycle to
> unsigned char?
> It might reduce the number of pad bytes somewhat.

You didn't quite follow the discussion.

I used bytes on V1, and we are not 100% sure its safe on all arches.

unsigned long is guaranteed to be safe. We absolutely rely on this.

Better use more bytes on a socket (with no impact on real memory use),
than spending hours to debug some strange issues.



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