diff options
| -rw-r--r-- | fs/btrfs/inode.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 0d67a14114e7..794d906cba6c 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8381,7 +8381,19 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset, */ wait_on_page_writeback(page); - if (offset) { + /* + * For subpage case, we have call sites like + * btrfs_punch_hole_lock_range() which passes range not aligned to + * sectorsize. + * If the range doesn't cover the full page, we don't need to and + * shouldn't clear page extent mapped, as page->private can still + * record subpage dirty bits for other part of the range. + * + * For cases that can invalidate the full even the range doesn't + * cover the full page, like invalidating the last page, we're + * still safe to wait for ordered extent to finish. + */ + if (!(offset == 0 && length == PAGE_SIZE)) { btrfs_releasepage(page, GFP_NOFS); return; } |