Re: Question on xfstest 274

[Eric Sandeen <sandeen@sandeen.net>]

On 1/29/12 8:43 PM, WuBo wrote:
> On 01/28/2012 04:51 AM, Eric Sandeen wrote:
>> Hi, I was wondering if you could describe your intent for 274 just a little more.
>>
>> The test says:
>>
>> # preallocation test
>>
>> but that is the only comment other than copyright.  ;)
> 
> Maybe the comment is too simple :)
> 
>>
>> I see that it does:
>>
>> # Make a 1G fs
>> # Create a single 4k file
>> # Allocate 1M past the EOF on that file
>> # Completely fill remaining space, using 2 other files
>> # Write 8k past EOF on the original file which has blocks past EOF
>>
>> but I am not certain what you are testing.  I presume that
>> you are testing the fact that the 1M past EOF should be truncated,
>> freeing up space, and allowing the 8k write to succeed?
>> Is that right?
> 
> Actually I write 8K at the end of 4K(seek=1), and what I want to test
> is the 8K-write should be succeed because the preallocation 1M. At the
> mean while, the file should not be truncated.

Ah, right - I missed the conv=notrunc sorry.  Ok, that all makes
sense.  I think I will try to clean up the test just a bit.

Thanks,
-Eric

> Thanks,
> wubo
> 
>>
>> However, at least on ext4 I noticed that the "fill the fs"
>> stage does not succeed; perhaps that should be tested as well.
>>
>> I can do some similar work on this like I did for 275, but I need
>> to be sure I understand your original intent for the test, first.
>>
>> Thanks,
>> -Eric
>>
> 
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