For filesystems such as nilfs2 and xfs that use block_page_mkwrite, modify that
function to wait for pending writeback before allowing the page to become
writable. This is needed to stabilize pages during writeback for those two
filesystems.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
fs/buffer.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index a08bb8e..cf9a795 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2361,6 +2361,7 @@ block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
if (!ret)
ret = block_commit_write(page, 0, end);
+ wait_on_page_writeback(page);
if (unlikely(ret)) {
unlock_page(page);
if (ret == -ENOMEM)
--
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