[PATCHv4 37/43] ext4: make ext4_da_page_release_reservation() aware about huge pages
From: Kirill A. Shutemov <hidden>
Date: 2016-10-25 00:13:36
Also in:
linux-block, linux-fsdevel, linux-mm, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
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 <redacted> --- fs/ext4/inode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
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))
--
2.9.3
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