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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-06-16 15:31:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:29 -0700 |
| commit | d30a11004e3411909f2448546f036a011978062e (patch) | |
| tree | c1980adb410d9fabd2c2eb8af9f0ed8ee4b656da /include | |
| parent | 2fad6f5deee5556f511eab58da78737a23ddb35d (diff) | |
| download | linux-rpi3-d30a11004e3411909f2448546f036a011978062e.tar.gz linux-rpi3-d30a11004e3411909f2448546f036a011978062e.tar.bz2 linux-rpi3-d30a11004e3411909f2448546f036a011978062e.zip | |
readahead: record mmap read-around states in file_ra_state
Mmap read-around now shares the same code style and data structure with
readahead code.
This also removes do_page_cache_readahead(). Its last user, mmap
read-around, has been changed to call ra_submit().
The no-readahead-if-congested logic is dumped by the way. Users will be
pretty sensitive about the slow loading of executables. So it's
unfavorable to disabled mmap read-around on a congested queue.
[akpm@linux-foundation.org: coding-style fixes]
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index ad613ed66ab0..33da7f538841 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1178,8 +1178,6 @@ void task_dirty_inc(struct task_struct *tsk); #define VM_MAX_READAHEAD 128 /* kbytes */ #define VM_MIN_READAHEAD 16 /* kbytes (includes current page) */ -int do_page_cache_readahead(struct address_space *mapping, struct file *filp, - pgoff_t offset, unsigned long nr_to_read); int force_page_cache_readahead(struct address_space *mapping, struct file *filp, pgoff_t offset, unsigned long nr_to_read); @@ -1197,6 +1195,9 @@ void page_cache_async_readahead(struct address_space *mapping, unsigned long size); unsigned long max_sane_readahead(unsigned long nr); +unsigned long ra_submit(struct file_ra_state *ra, + struct address_space *mapping, + struct file *filp); /* Do stack extension */ extern int expand_stack(struct vm_area_struct *vma, unsigned long address); |