tree d02b32ca92fde9a04be9bee0f0b7c8961479448c
parent 2ba2d00363975242dee9bb22cf798b487e3cd61e
author Fengguang Wu <wfg@mail.ustc.edu.cn> 1184834875 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184864683 -0700

readahead: introduce PG_readahead

Introduce a new page flag: PG_readahead.

It acts as a look-ahead mark, which tells the page reader: Hey, it's time to
invoke the read-ahead logic.  For the sake of I/O pipelining, don't wait until
it runs out of cached pages!

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>