readahead: convert filemap invocations

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Convert filemap reads to use on-demand readahead.

The new call scheme is to
- call readahead on non-cached page
- call readahead on look-ahead page
- update prev_index when finished with the read request

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: Steven Pratt <slpratt@austin.ibm.com>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Fengguang Wu 2007-07-19 01:48:02 -07:00 • committed by Linus Torvalds

parent 122a21d11c

commit 3ea89ee86a

1 changed files with 31 additions and 20 deletions

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mm/filemap.c

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