Re: [PATCH] do_generic_file_read / readahead adjustments

[Andrew Morton <akpm@digeo.com>]

David Howells wrote:
> 
> This patch is the alternative: make a function (do_generic_mapping_read())
> that I can pass an inode or an address_space to, and make
> do_generic_file_read() call that. This allows me to make use of readahead
> semantics without having to reinvent them for myself.
> 

OK.  The current readahead and mpage code is really designed just
for ext2-style filesystems.  It was always expected that it would 
have to grow as more sophisticated filesytems put demands upon it.

Your change is a perfectly sensible generalisation.  The reiserfs
team have been making noises about lower-level readahead hooks as well,
and I think your patch largely addresses those.  I shall ping them.