Re: [RFC][fat] use mpage_readpage when cluster size is page-alignment

[cai <junjiec@gmail.com>]

hi,

> I am not sure I am following you. Shouldn't do_mpage_readpage work for
> all adjacent blocks regardless of whether block size is page-aligned
> or not? What's is the performance problem you're thinking of?
>
>                            Pekka
>
>  
no, not block size but cluster size
as you know, in FAT, file is organized in clusters
and one cluster could have N blocks(sectors).
so if cluster size is not page-aligned,
a page may live in non-adjacent blocks, and
do_mpage_readpage has to fall back to block_read_full_page
in this case.

thanks.
                                  junjie

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