linux-kernel - Re: Linux 3.3-rc4

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Message-ID: <1329850714.1419.2.camel@localhost.localdomain>
Date:	Tue, 21 Feb 2012 19:58:34 +0100
From:	Thomas Meyer <thomas@...3r.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ian Kent <raven@...maw.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 3.3-rc4

Am Sonntag, den 19.02.2012, 10:45 -0800 schrieb Linus Torvalds:
> On Sun, Feb 19, 2012 at 5:42 AM, Thomas Meyer <thomas@...3r.de> wrote:
> >
> > 1.) autofs4 interface is broken between x86 and x86_64. as systemd uses autofs, this bug hangs the boot process as e.g. binfmt is mounted via autofs. see also http://lists.freedesktop.org/archives/systemd-devel/2011-September/003396.html
> 
> Duh.
> 
> That is just broken.
> 
> The code even *talks* about how the packet layout is the same on
> 32-bit and 64-bit architectures, and that's largely true.
> 
> However, while true, x86-64 has 8-byte alignment for 'long', and
> x86-32 has 4-byte alignment. Which means that even though the
> structure layout is exactly the same, on x86-64 the *alignment* issue
> will push it out to 304 bytes.
> 
> That's just stupid. We've had that problem before. It's easy to
> overlook, but that packet is just mis-designed.
> 
> The attached patch isn't pretty, but this is definitely a kernel bug.
> Binary compatibility is *important*, dammit.
> 
> Does this fix it?

yes, it does!

thanks.



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