diff mbox

[PATCHv4,37/43] ext4: make ext4_da_page_release_reservation() aware about huge pages

Message ID 20161025001342.76126-38-kirill.shutemov@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kirill A . Shutemov Oct. 25, 2016, 12:13 a.m. UTC 
For huge pages 'stop' must be within HPAGE_PMD_SIZE.
Let's use hpage_size() in the BUG_ON().

We also need to change how we calculate lblk for cluster deallocation.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 fs/ext4/inode.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 59cd2b113eb2..869df0504174 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1565,7 +1565,7 @@  static void ext4_da_page_release_reservation(struct page *page,
 	int num_clusters;
 	ext4_fsblk_t lblk;
 
-	BUG_ON(stop > PAGE_SIZE || stop < length);
+	BUG_ON(stop > hpage_size(page) || stop < length);
 
 	head = page_buffers(page);
 	bh = head;
@@ -1600,7 +1600,8 @@  static void ext4_da_page_release_reservation(struct page *page,
 	 * need to release the reserved space for that cluster. */
 	num_clusters = EXT4_NUM_B2C(sbi, to_release);
 	while (num_clusters > 0) {
-		lblk = (page->index << (PAGE_SHIFT - inode->i_blkbits)) +
+		lblk = ((page->index + offset / PAGE_SIZE) <<
+				(PAGE_SHIFT - inode->i_blkbits)) +
 			((num_clusters - 1) << sbi->s_cluster_bits);
 		if (sbi->s_cluster_ratio == 1 ||
 		    !ext4_find_delalloc_cluster(inode, lblk))