Fold file_ra_state.mmap_hit into file_ra_state.mmap_miss and make it an int. Signed-off-by: Fengguang Wu --- include/linux/fs.h | 3 +-- mm/filemap.c | 4 ++-- 2 files changed, 3 insertions(+), 4 deletions(-) --- linux-2.6.22-rc6-mm1.orig/include/linux/fs.h +++ linux-2.6.22-rc6-mm1/include/linux/fs.h @@ -777,8 +777,7 @@ struct file_ra_state { there are only # of pages ahead */ unsigned int ra_pages; /* Maximum readahead window */ - unsigned long mmap_hit; /* Cache hit stat for mmap accesses */ - unsigned long mmap_miss; /* Cache miss stat for mmap accesses */ + int mmap_miss; /* Cache miss stat for mmap accesses */ unsigned long prev_index; /* Cache last read() position */ unsigned int prev_offset; /* Offset where last read() ended in a page */ }; --- linux-2.6.22-rc6-mm1.orig/mm/filemap.c +++ linux-2.6.22-rc6-mm1/mm/filemap.c @@ -1389,7 +1389,7 @@ 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; /* @@ -1415,7 +1415,7 @@ 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 -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/