Re: [RFC][PATCH 0/3] Extent base online defrag

["Takashi Sato" <sho@tnes.nec.co.jp>]

Hi,

>> > - Specify the target area in a file using the following structure:
>> >   struct ext3_ext_defrag_data {
>> >   loff_t start_offset; /* start offset to defrag in bytes */
>> >   loff_t defrag_size;  /* size of defrag in bytes */
>> >   }
>> >   It uses loff_t so that the size of the structure is identical on
>> >   both 32 bits and 64 bits architecture.
>> >   Block allocation, including searching for the free contiguous
>> >   blocks, is implemented in kernel.
>> 
>> NAK the ioctl approach.
> 
> I agree it shouldn't go into mainline this way, but while the details of
> the proper interface are debated, this implementation at least allows
> the core function to be tested & reviewed.
> 
>> People who like ioctls are just holdovers from non-Linux OS's.

Thank you for your comments.
My patches are at the experimental phase and the ioctl approach is
the provisional solution.
But I intend to continue this work with ioctl approach, if there are no
actual problems.

Cheers, Takashi