Testing this patch:
Xfstests generic/335, generic/336 sometimes crash with the following message:
F2FS-fs (dm-0): detect filesystem reference count leak during umount, type: 9,
count: 1
------------[ cut here ]------------
kernel BUG at fs/f2fs/super.c:1939!
Oops: invalid opcode: 0000 [#1] SMP NOPTI
CPU: 1 UID: 0 PID: 609351 Comm: umount Tainted: G W
6.17.0-rc5-xfstests-g9dd1835ecda5 #1 PREEMPT(none)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2
04/01/2014
RIP: 0010:f2fs_put_super+0x3b3/0x3c0
Call Trace:
<TASK>
generic_shutdown_super+0x7e/0x190
kill_block_super+0x1a/0x40
kill_f2fs_super+0x9d/0x190
deactivate_locked_super+0x30/0xb0
cleanup_mnt+0xba/0x150
task_work_run+0x5c/0xa0
exit_to_user_mode_loop+0xb7/0xc0
do_syscall_64+0x1ae/0x1c0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
</TASK>
---[ end trace 0000000000000000 ]---
It appears that sometimes it is possible that f2fs_put_super() is called before
all node page reads are completed.
Adding a call to f2fs_wait_on_all_pages() for F2FS_RD_NODE fixes the problem.
Fixes: 20872584b8c0b ("f2fs: fix to drop all dirty meta/node pages during
umount()")
Signed-off-by: Jan Prusakowski <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/super.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index bdb5ddb4f966..0b0ef8ba243b 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1989,14 +1989,6 @@ static void f2fs_put_super(struct super_block *sb)
truncate_inode_pages_final(META_MAPPING(sbi));
}
- for (i = 0; i < NR_COUNT_TYPE; i++) {
- if (!get_pages(sbi, i))
- continue;
- f2fs_err(sbi, "detect filesystem reference count leak during "
- "umount, type: %d, count: %lld", i, get_pages(sbi, i));
- f2fs_bug_on(sbi, 1);
- }
-
f2fs_bug_on(sbi, sbi->fsync_node_num);
f2fs_destroy_compress_inode(sbi);
@@ -2007,6 +1999,15 @@ static void f2fs_put_super(struct super_block *sb)
iput(sbi->meta_inode);
sbi->meta_inode = NULL;
+ /* Should check the page counts after dropping all node/meta pages */
+ for (i = 0; i < NR_COUNT_TYPE; i++) {
+ if (!get_pages(sbi, i))
+ continue;
+ f2fs_err(sbi, "detect filesystem reference count leak during "
+ "umount, type: %d, count: %lld", i, get_pages(sbi, i));
+ f2fs_bug_on(sbi, 1);
+ }
+
/*
* iput() can update stat information, if f2fs_write_checkpoint()
* above failed with error.
--
2.51.1.851.g4ebd6896fd-goog
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