diff options
| author | NeilBrown | 2005-06-22 02:17:22 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2005-06-22 04:07:45 +0200 |
| commit | aa3163f81654fa057039258e32a6811147bf0c14 (patch) | |
| tree | 6b0fc95fc696ebdb1f5acc78df253b6c242de430 /drivers | |
| parent | [PATCH] md: enable the bitmap write-back daemon and wait for it. (diff) | |
| download | kernel-qcow2-linux-aa3163f81654fa057039258e32a6811147bf0c14.tar.gz kernel-qcow2-linux-aa3163f81654fa057039258e32a6811147bf0c14.tar.xz kernel-qcow2-linux-aa3163f81654fa057039258e32a6811147bf0c14.zip | |
[PATCH] md: don't skip bitmap pages due to lack of bit that we just cleared.
When looking for pages that need cleaning we skip pages that don't have
BITMAP_PAGE_CLEAN set. But if it is the 'current' page we will have cleared
that bit ourselves, so skipping it is wrong. So: move the 'skip this page'
inside 'if page != lastpage'.
Also fold call of file_page_offset into the one place where the value (bit) is
used.
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/bitmap.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 86b6b037fa44..204564dc6a0d 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -897,7 +897,7 @@ static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap, int bitmap_daemon_work(struct bitmap *bitmap) { - unsigned long bit, j; + unsigned long j; unsigned long flags; struct page *page = NULL, *lastpage = NULL; int err = 0; @@ -920,24 +920,23 @@ int bitmap_daemon_work(struct bitmap *bitmap) } page = filemap_get_page(bitmap, j); - /* skip this page unless it's marked as needing cleaning */ - if (!((attr=get_page_attr(bitmap, page)) & BITMAP_PAGE_CLEAN)) { - if (attr & BITMAP_PAGE_NEEDWRITE) { - page_cache_get(page); - clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE); - } - spin_unlock_irqrestore(&bitmap->lock, flags); - if (attr & BITMAP_PAGE_NEEDWRITE) { - if (write_page(bitmap, page, 0)) - bitmap_file_kick(bitmap); - page_cache_release(page); - } - continue; - } - - bit = file_page_offset(j); if (page != lastpage) { + /* skip this page unless it's marked as needing cleaning */ + if (!((attr=get_page_attr(bitmap, page)) & BITMAP_PAGE_CLEAN)) { + if (attr & BITMAP_PAGE_NEEDWRITE) { + page_cache_get(page); + clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE); + } + spin_unlock_irqrestore(&bitmap->lock, flags); + if (attr & BITMAP_PAGE_NEEDWRITE) { + if (write_page(bitmap, page, 0)) + bitmap_file_kick(bitmap); + page_cache_release(page); + } + continue; + } + /* grab the new page, sync and release the old */ page_cache_get(page); if (lastpage != NULL) { @@ -979,7 +978,7 @@ int bitmap_daemon_work(struct bitmap *bitmap) -1); /* clear the bit */ - clear_bit(bit, page_address(page)); + clear_bit(file_page_offset(j), page_address(page)); } } spin_unlock_irqrestore(&bitmap->lock, flags); |