Re: [nikita-3002]: assertion failed: carry_level_invariant(doing, CARRY_DOING)

[Alexander Zarochentsev <zam@namesys.com>]

Hello,

> I've just had some warnings show up in my kernel log. I don't know if
> they're related to the troubles I've been having (I fscked after the
> last panic).

please apply the following patch:

re-add to reiser4_releasepage mistakenly removed page_count check.
extra page reference is used to protect page from detaching from the 
jnode.

Signed-off-by: Alexander Zarochentsev <zam@namesys.com>
---
 fs/reiser4/as_ops.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: linux-2.6-git/fs/reiser4/as_ops.c
===================================================================
--- linux-2.6-git.orig/fs/reiser4/as_ops.c
+++ linux-2.6-git/fs/reiser4/as_ops.c
@@ -350,6 +350,11 @@ int reiser4_releasepage(struct page *pag
 	if (PageDirty(page))
 		return 0;
 
+	/* extra page reference is used by reiser4 to protect
+	 * jnode<->page link from this ->releasepage(). */
+	if (page_count(page) > 3)
+		return 0;
+
 	/* releasable() needs jnode lock, because it looks at the jnode fields
 	 * and we need jload_lock here to avoid races with jload(). */
 	spin_lock_jnode(node);