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readahead: mmap read-around simplification

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Fold file_ra_state.mmap_hit into file_ra_state.mmap_miss and make it an int.

Signed-off-by: Fengguang Wu <[email protected]>
Cc: Rusty Russell <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Fengguang Wu 2007-10-16 01:24:32 -07:00 • committed by Linus Torvalds
commit 0bb7ba6b9c
2 changed files with 3 additions and 4 deletions
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4
mm/filemap.c
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@ -1349,7 +1349,7 @@ retry_find:
* Do we miss much more than hit in this file? If so,
* stop bothering with read-ahead. It will only hurt.
*/
if (ra->mmap_miss > ra->mmap_hit + MMAP_LOTSAMISS)
if (ra->mmap_miss > MMAP_LOTSAMISS)
goto no_cached_page;
/*
@ -1375,7 +1375,7 @@ retry_find:
}
if (!did_readaround)
ra->mmap_hit++;
ra->mmap_miss--;
/*
* We have a locked page in the page cache, now we need to check