diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 8644df8ba527..f12a0f90d6e4 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5225,11 +5225,20 @@ int read_extent_buffer_pages(struct extent_io_tree *tree, lock_page(page); } locked_pages++; + } + /* + * We need to firstly lock all pages to make sure that + * the uptodate bit of our pages won't be affected by + * clear_extent_buffer_uptodate(). + */ + for (i = start_i; i < num_pages; i++) { + page = eb->pages[i]; if (!PageUptodate(page)) { num_reads++; all_uptodate = 0; } } + if (all_uptodate) { if (start_i == 0) set_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); |