linux-kernel - Re: Linux 2.6.27.27

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Message-ID: <alpine.LNX.1.10.0907210831210.29729@bizon.gios.gov.pl>
Date:	Tue, 21 Jul 2009 08:33:34 +0200 (CEST)
From:	Krzysztof Oledzki <ole@....pl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Krzysztof Oledzki <olel@....pl>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, stable@...nel.org,
	lwn@....net
Subject: Re: Linux 2.6.27.27



On Mon, 20 Jul 2009, Linus Torvalds wrote:

>
>
> On Mon, 20 Jul 2009, Krzysztof Oledzki wrote:
>>
>> No problem. Please let me know what should I do to help tracking this issue.
>
> Can you build two kernels: one with -fwrapv, and one with
> -fno-strict-overflow, and then verify that
>
> - they are otherwise identical (ie exact same source code, same compiler
>   etc)
>
> - verify that yes, the -fwrapv kernel works, the other does not. Just to
>   avoid the confusion that obviously exists with Debian/sid binutils
>   upgrades that _also_ happens result in nonbootable kernels.
>
> - upload the 'vmlinux' images somewhere (I'm not sure what the limits for
>   binary attachments are at the kernel bugzilla, but that would be the
>   logical place)
>
> In fact, it would be nice to have a third "identical" kernel build, except
> with neither -fwrapv/-fno-strict-overflow.

OK. Right now I'm building the three kernels you asked for 
(fwrapv/fno-strict-overflow/none). I'll test them and upload vmlinux 
images.

Best regards,

 				Krzysztof Olędzki