[lkml]   [2009]   [Jul]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Linux

On Mon, 20 Jul 2009, Linus Torvalds wrote:

> On Mon, 20 Jul 2009, Marc Dionne wrote:
>>> Hmm. This sounds more like the binutils bug that people had. Sounds like
>>> an assembler bug if the *.o file ends up being empty or at some fixed
>>> size. If it was cc1 that fails, I'd expect to not see an *.o file at all,
>>> since it didn't generate good assembly.
>>> In fact, your behavior sounds like the thing that produces the *.o files
>>> core-dumped or died for other reasons, and had a 64kB buffer that either
>>> got flushed or not. That would explain the "zero or exactly 64kB" size.
>>> It could be ccache too, of course.
>> Actually in my case it turns out that it is ccache after all - if I remove it
>> from the picture everything is fine. If I re-enable it, even with a clean
>> cache, I get the problem.
>> It might just be a coincidence that it's triggered by the -fwrapv change.
> Ok, so this is getting ridiculous. Do we have _three_ different kernel
> issues going on at the same time, all subtly related to tools issues
> rather than the kernel source tree itself?
> That's just completely bizarre.
> So right now we have:
> - Krzysztof Oledzki: the only one who so far has really pinpointed it to
> the -fwrapv change itself.
> It would be good to really double-check that this is not about ccache,
> since Marc apparently gets a good kernel without ccache, and -fwrapv
> seems to be involved.

There is no ccache configured in my systems and the same problem appears
on a different servers (both i386 and x86-64). However, the configs are
very similar and the hardware is nearly identical.

I'm pretty sure the only different between bootable and unbootable kernel
is that fwrapv vs strict-overflow change.

Best regards,

Krzysztof Olędzki
 \ /
  Last update: 2009-07-21 08:43    [W:0.062 / U:4.564 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site