From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
When the mode is MIGRATE_SYNC, we are allowed to call nfs_wb_folio()
under the folio lock.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/write.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 374fc6b34c79..0dd22983f0d0 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -2113,8 +2113,12 @@ int nfs_migrate_folio(struct address_space *mapping, struct folio *dst,
* that we can safely release the inode reference while holding
* the folio lock.
*/
- if (folio_test_private(src))
- return -EBUSY;
+ if (folio_test_private(src)) {
+ if (mode == MIGRATE_SYNC)
+ nfs_wb_folio(src->mapping->host, src);
+ if (folio_test_private(src))
+ return -EBUSY;
+ }
if (folio_test_private_2(src)) { /* [DEPRECATED] */
if (mode == MIGRATE_ASYNC)
--
2.49.0
