[Bug 255473] Infinite writes on UFS with SU+J filesystem

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255473

--- Comment #37 from Jack <xxjack12xx@gmail.com> ---
Created attachment 225399
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=225399&action=edit
Unable to disable journal on softupdates after applying patch

I'm still unable to turn off journaling with the patch.

root@upstairs:/usr/src # git diff
diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
index 2cc16ab2a2c1..cc3f64b4e70e 100644
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -2653,6 +2653,10 @@ softdep_uninitialize()
        callout_drain(&softdep_callout);
 }

+static int enable_suj = 0;
+SYSCTL_INT(_debug_softdep, OID_AUTO, enable_suj, CTLFLAG_RW,
+    &enable_suj, 0, "Enable the activation of journaled soft updates");
+
 /*
  * Called at mount time to notify the dependency code that a
  * filesystem wishes to use it.
@@ -2716,7 +2720,7 @@ softdep_mount(devvp, mp, fs, cred)
        ACQUIRE_GBLLOCK(&lk);
        TAILQ_INSERT_TAIL(&softdepmounts, sdp, sd_next);
        FREE_GBLLOCK(&lk);
-       if ((fs->fs_flags & FS_SUJ) &&
+       if (enable_suj && (fs->fs_flags & FS_SUJ) &&
            (error = journal_mount(mp, fs, cred)) != 0) {
                printf("Failed to start journal: %d\n", error);
                softdep_unmount(mp);

root@upstairs:/usr/src # uname -a
FreeBSD upstairs.jack.com 13.0-STABLE FreeBSD 13.0-STABLE #0
stable/13-n245805-4a4a174959ce-dirty: Sun May 30 23:31:47 PDT 2021    
jack@upstairs.jack.com:/usr/obj/usr/src/amd64.amd64/sys/UPSTAIRS  amd64

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