diff options
Diffstat (limited to 'fs/fs-writeback.c')
-rw-r--r-- | fs/fs-writeback.c | 43 |
1 files changed, 23 insertions, 20 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 916e83489caa..15e375bf93e6 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c | |||
@@ -750,29 +750,32 @@ static long wb_writeback(struct bdi_writeback *wb, | |||
750 | wrote += MAX_WRITEBACK_PAGES - wbc.nr_to_write; | 750 | wrote += MAX_WRITEBACK_PAGES - wbc.nr_to_write; |
751 | 751 | ||
752 | /* | 752 | /* |
753 | * If we ran out of stuff to write, bail unless more_io got set | 753 | * If we consumed everything, see if we have more |
754 | */ | 754 | */ |
755 | if (wbc.nr_to_write > 0) { | 755 | if (wbc.nr_to_write <= 0) |
756 | if (wbc.more_io) { | 756 | continue; |
757 | if (wbc.nr_to_write < MAX_WRITEBACK_PAGES) | 757 | /* |
758 | continue; | 758 | * Didn't write everything and we don't have more IO, bail |
759 | /* | 759 | */ |
760 | * Nothing written. Wait for some inode to | 760 | if (!wbc.more_io) |
761 | * become available for writeback. Otherwise | ||
762 | * we'll just busyloop. | ||
763 | */ | ||
764 | spin_lock(&inode_lock); | ||
765 | if (!list_empty(&wb->b_more_io)) { | ||
766 | inode = list_entry( | ||
767 | wb->b_more_io.prev, | ||
768 | struct inode, i_list); | ||
769 | inode_wait_for_writeback(inode); | ||
770 | } | ||
771 | spin_unlock(&inode_lock); | ||
772 | continue; | ||
773 | } | ||
774 | break; | 761 | break; |
762 | /* | ||
763 | * Did we write something? Try for more | ||
764 | */ | ||
765 | if (wbc.nr_to_write < MAX_WRITEBACK_PAGES) | ||
766 | continue; | ||
767 | /* | ||
768 | * Nothing written. Wait for some inode to | ||
769 | * become available for writeback. Otherwise | ||
770 | * we'll just busyloop. | ||
771 | */ | ||
772 | spin_lock(&inode_lock); | ||
773 | if (!list_empty(&wb->b_more_io)) { | ||
774 | inode = list_entry(wb->b_more_io.prev, | ||
775 | struct inode, i_list); | ||
776 | inode_wait_for_writeback(inode); | ||
775 | } | 777 | } |
778 | spin_unlock(&inode_lock); | ||
776 | } | 779 | } |
777 | 780 | ||
778 | return wrote; | 781 | return wrote; |