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

[OGAWA Hirofumi]

Lukas Czerner <lczerner@xxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxx>
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