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| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2005-05-01 08:58:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-01 08:58:37 -0700 |
| commit | edfbe2b0038723e5699ab22695ccd62b5542a5c1 (patch) | |
| tree | f1c613d32824f274b0e3daf492e87b0c9051c789 /mm/highmem.c | |
| parent | 2054606ad6dd6fee559fe790f190b15ed9355237 (diff) | |
| download | lwn-edfbe2b0038723e5699ab22695ccd62b5542a5c1.tar.gz lwn-edfbe2b0038723e5699ab22695ccd62b5542a5c1.zip | |
[PATCH] count bounce buffer pages in vmstat
This is a patch for counting the number of pages for bounce buffers. It's
shown in /proc/vmstat.
Currently, the number of bounce pages are not counted anywhere. So, if
there are many bounce pages, it seems that there are leaked pages. And
it's difficult for a user to imagine the usage of bounce pages. So, it's
meaningful to show # of bouce pages.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/highmem.c')
| -rw-r--r-- | mm/highmem.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/highmem.c b/mm/highmem.c index d01276506b00..400911599468 100644 --- a/mm/highmem.c +++ b/mm/highmem.c @@ -325,6 +325,7 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool, int err) continue; mempool_free(bvec->bv_page, pool); + dec_page_state(nr_bounce); } bio_endio(bio_orig, bio_orig->bi_size, err); @@ -405,6 +406,7 @@ static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig, to->bv_page = mempool_alloc(pool, q->bounce_gfp); to->bv_len = from->bv_len; to->bv_offset = from->bv_offset; + inc_page_state(nr_bounce); if (rw == WRITE) { char *vto, *vfrom; |