From 72508db0fe1762f2cfcff1cb4cf28a8e645bdd43 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 24 Jun 2025 17:32:09 -0400 Subject: [PATCH] NFS: Allow folio migration for the case of mode == MIGRATE_SYNC When the mode is MIGRATE_SYNC, we are allowed to call nfs_wb_folio() under the folio lock. Reviewed-by: Benjamin Coddington Signed-off-by: Trond Myklebust --- 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) -- 2.25.1