On Tue, 2009-04-28 at 13:39 -0400, Marc R. O'Connor wrote:
> I have had two 'kernel bug' issues today both referencing file-item.c.
> The first oops happened when i was cp'ing from and external HD(ext3) to
> and ext3 partition. The second happened during boot up. I have attached
> them both.
> 
> Im using btrfs that was merged into my kernel yesterday.
> 
> plain text document attachment (btrfs_bug_1)
> Apr 28 10:55:10 cosmo2 ------------[ cut here ]------------
> Apr 28 10:55:10 cosmo2 kernel BUG at fs/btrfs/file-item.c:494!

Well, I think I see the bug.  It looks like we want to do

-        if (key->offset < bytenr && csum_end <= end_byte) {
+        if (key->offset <= bytenr && csum_end <= end_byte) {

in truncate_one_csum.  But I need to test that here for a bit and send
you a patch.

-chris


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