Messages in this thread Patch in this message | | | Date | Sat, 21 Jul 2007 11:57:34 +0800 | From | Fengguang Wu <> | Subject | [PATCH 1/8] compacting file_ra_state |
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Use 'unsigned int' instead of 'unsigned long' for readahead sizes.
This helps reduce memory consumption on 64bit CPU when a lot of files are opened.
CC: Andi Kleen <andi@firstfloor.org> Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn> --- include/linux/fs.h | 8 ++++---- mm/readahead.c | 2 +- 2 files changed, 5 insertions(+), 5 deletions(-)
--- linux-2.6.22-git15.orig/include/linux/fs.h +++ linux-2.6.22-git15/include/linux/fs.h @@ -697,12 +697,12 @@ struct fown_struct { * Track a single file's readahead state */ struct file_ra_state { - pgoff_t start; /* where readahead started */ - unsigned long size; /* # of readahead pages */ - unsigned long async_size; /* do asynchronous readahead when + pgoff_t start; /* where readahead started */ + unsigned int size; /* # of readahead pages */ + unsigned int async_size; /* do asynchronous readahead when there are only # of pages ahead */ - unsigned long ra_pages; /* Maximum readahead window */ + 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 */ unsigned long prev_index; /* Cache last read() position */ --- linux-2.6.22-git15.orig/mm/readahead.c +++ linux-2.6.22-git15/mm/readahead.c @@ -350,7 +350,7 @@ ondemand_readahead(struct address_space bool hit_readahead_marker, pgoff_t offset, unsigned long req_size) { - unsigned long max; /* max readahead pages */ + int max; /* max readahead pages */ int sequential; max = ra->ra_pages; -- - 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/
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