linux-kernel - Re: [linux-dvb] compiling on 2.6.28 broken?

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Message-ID: <496F9174.5080907@gmx.de>
Date:	Thu, 15 Jan 2009 20:41:40 +0100
From:	wk <handygewinnspiel@....de>
To:	wk <handygewinnspiel@....de>, Chris Mason <chris.mason@...cle.com>,
	Matthew Wilcox <matthew@....cx>,
	Andrew Morton <akpm@...ux-foundation.org>, rjw@...k.pl,
	HWerner4@....de, viro@...iv.linux.org.uk,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	mchehab@...radead.org
Subject: Re: [linux-dvb] compiling on 2.6.28 broken?

Dave Chinner wrote:
> On Wed, Jan 14, 2009 at 10:19:39PM +0100, wk wrote:
>   
>> Chris Mason wrote:
>> I cannot fully understand what strace -v outputs (see attachment), but  
>> what i see is that 'find' stops after finding a file with d_off = 
>> 4294967295
>> 4294967295  =  0xFFFFFFFF, adding any number greater that zero will be  
>> greater that 32bits, so this could be the reason for the message "value  
>> too large".
>>
>>
>>
>> I also noticed that i cannot access these files through samba if i boot  
>> from 2.6.28 - really strange.
>> If i reboot older kernels these are visible in samba again and fully  
>> accessible.
>>
>> Attached the log from stracing the command which was ivoked by the  
>> Makefile from v4l-dvb.
>> I guess this is all i could contribute to that problem. Thats stuff for  
>> xfs filesystem experts now..
>>     
>
> It's obviously the regression fixed by:
>
> http://oss.sgi.com/cgi-bin/gitweb.cgi?p=xfs/xfs.git;a=commit;h=15440319767942a363f282d6585303d3d75088ba
>
> It needs to be pushed to Linus, then into 2.6.28-stable.
>
> Cheers,
>
> Dave.
>   

Yes, that solves the problems as expected. But may i kindly ask the xfs 
fs developers to put some more readable patch here,
so that its better understandable by looking at the source code? I think 
some macro would be better here, for example i used

#define TRUNC_TO_SIGNED32(x) (x & 0x7FFFFFFF)

inside xfs.h and replaced all "foo & 0x7fffffff" with 
"TRUNC_TO_SIGNED32(foo)".

Thanks for your help,
Winfried
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