Re: 2.6.21-git10/11: files getting truncated on xfs? or maybe annlink problem?

[Jan Engelhardt]

On May 10 2007 10:38, Matt Mackall wrote:
>> 
>>     for i in `seq 20`; do
>>     	hg clone -U --pull a b-$i
>>     	hg verify b-$i		# always OK
>>     	umount /home
>>     	sleep 5
>>     	mount /home
>>     	hg verify b-$i		# often found truncated files
>>     done
>>       
[...]
>
>This test looks like it should consist solely of open-for-append and
>write on about 20k files in the target directory. Because of the
>--pull, no hardlinks are involved. It shouldn't be all that different
>from doing tar cf - a | tar xf - b.
>
>The files get visited in alphabetical order, so the start of the
>corruption may be telling.

You should not assume alphabetical order. Filesystems may be free to
reorder things and return them (1) randomly like in a hash (2) by
creation time during readdir().


	Jan
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