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[PATCHv3,35/41] ext4: make ext4_da_page_release_reservation() aware about huge pages

Message ID 20160915115523.29737-36-kirill.shutemov@linux.intel.com
State Superseded, archived
Headers show

Commit Message

Kirill A. Shutemov Sept. 15, 2016, 11:55 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(-)
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Patch

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index deacd3499ec7..6a8da1a8409c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1558,7 +1558,7 @@  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;
@@ -1593,7 +1593,8 @@  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))