From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Vegard Nossum <vegard.nossum@gmail.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
linux-kernel@vger.kernel.org, stable@kernel.org
Subject: Re: [PATCH] kmemcheck: make bitfield annotations truly no-ops when disabled
Date: Wed, 09 Dec 2009 15:31:34 +0200 [thread overview]
Message-ID: <4B1FA6B6.8070701@cs.helsinki.fi> (raw)
In-Reply-To: <20091207141356.9e83fd5b.akpm@linux-foundation.org>
Andrew Morton kirjoitti:
> On Sun, 6 Dec 2009 18:42:13 +0100
> Vegard Nossum <vegard.nossum@gmail.com> wrote:
>
>> It turns out that even zero-sized struct members (int foo[0];) will affect
>> the struct layout, causing us in particular to lose 4 bytes in struct sock.
>>
>> This patch fixes the regression in CONFIG_KMEMCHECK=n case.
>
> Which kernel version is the regression relative to?
AFAICT, it dates back to 2.6.31 when kmemcheck was introduced in
mainline. Vegard?
> Should we backport this into 2.6.32.x?
I guess so. Eric, how bad is the regression?
Pekka
next prev parent reply other threads:[~2009-12-09 13:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-06 17:42 Vegard Nossum
2009-12-07 7:30 ` Pekka Enberg
2009-12-07 22:13 ` Andrew Morton
2009-12-09 13:31 ` Pekka Enberg [this message]
2009-12-09 13:54 ` Eric Dumazet
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