[PATCH] xfstests: generic/255: Execute only if blocksize <= 4096

[Eric Sandeen]

On 8/26/13 12:38 AM, chandan wrote:
> On Sunday, August 25, 2013 11:54:30 AM Eric Sandeen wrote:
>> Can you explain why this is necessary?
>>
>> What failures do you see, on what filesystems?
> 
> generic/255 currently fails on Btrfs on a ppc64 machine with 64k page size and
> hence 64k block size.
> 
> generic/255 has been written to test the corner cases for 4k block size. I did
> try to make it work with variable sized block sizes, But I got stuck
> working with md5sum (since we would need two sets of md5sums, due to
> _test_generic_punch() being invoked with and without '-k' option per block
> size). 
> 
> Since 4k block size support for Btrfs on ppc64 is already being worked on, I
> think its better to prevent execution of generic/255 for block sizes greater
> than 4k.
> 
> Apologies for not including the above description in the patch.

It happens.  ;)

To be honest I haven't really looked at how _test_generic_punch & generic/255
works lately.

Just as a sanity check, does it also fail on xfs for 64k block sizes on ppc64?

Thanks,
-Eric