diff mbox series

[5/6] fs: allow pagefault based writers to be frozen

Message ID 20250401-work-freeze-v1-5-d000611d4ab0@kernel.org (mailing list archive)
State New
Headers show
Series power: wire-up filesystem freeze/thaw with suspend/resume | expand

Commit Message

Christian Brauner April 1, 2025, 12:32 a.m. UTC 
Otherwise tasks such as systemd-journald that mmap a file and write to
it will not be frozen after we've frozen the filesystem.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 include/linux/fs.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b379a46b5576..528e73f192ac 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1782,7 +1782,8 @@  static inline void __sb_end_write(struct super_block *sb, int level)
 static inline void __sb_start_write(struct super_block *sb, int level)
 {
 	percpu_down_read_freezable(sb->s_writers.rw_sem + level - 1,
-				   level == SB_FREEZE_WRITE);
+				   (level == SB_FREEZE_WRITE ||
+				    level == SB_FREEZE_PAGEFAULT));
 }
 
 static inline bool __sb_start_write_trylock(struct super_block *sb, int level)