Re: [PATCH v6] fat: Batched discard support for fat

OGAWA Hirofumi
2011-05-24T11:14:43Z

Lukas Czerner <lczerner@redhat.com> writes:

>> No. If you want to trim whole with some chunk like 1GB and periodically
>> (IIRC in xfstest), what do? We have to trim until ULLONG_MAX for each
>> 1GB?
>>
>> Thanks.
>>
>
> What ? No, of course not. As I said, just go through 1G worth of filesystem
> blocks skipping metadata. However we do have a special case when we
> adjust start and len according to the first data block (which is only
> the case of 1024B blocksize).
>
> if (start < first_data_blk) {
> len -= first_data_blk - start;
> start = first_data_blk;
> }
>
> Which means that we just skip the first block (or whatever first data
> block is). And this is the same as skipping metadata.

Are you read my email? So, FAT adjust 2 blocks, ext* 1 block, and what
is other? The middle was guaranteed as continued? So, which is end of
blocks?
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>