Bug#615998: linux-image-2.6.32-5-xen-amd64: Repeatable "kernel BUG at fs/jbd2/commit.c:534" from Postfix on ext4

[Sean Ryle <seanbo@gmail.com>]

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Maybe I am wrong here, but shouldn't the cast be to (unsigned long) or to
(sector_t)?

Line 534 of commit.c:
                        jbd_debug(4, "JBD: got buffer %llu (%p)\n",
                                (unsigned long long)bh->b_blocknr,
bh->b_data);

Line 64 of buffer_head.h:
         sector_t b_blocknr;             /* start block number */

Lines 137-143 of include/linux/types/h:
#ifdef CONFIG_LBDAF
typedef u64 sector_t;
typedef u64 blkcnt_t;
#else
typedef unsigned long sector_t;
typedef unsigned long blkcnt_t;
#endif

Is it possible he is experiencing the panic due to a bad cast in the call to
jbd_debug() in fs/jbd2/commit.c?  It would seem to me this should be cast to
(sector_t).  Any thoughts?



On Thu, Jun 23, 2011 at 2:32 PM, Moffett, Kyle D
<Kyle.D.Moffett@boeing.com>wrote:

> Hello again everyone,
>
> I'm in the middle of doing some software testing on a pre-production
> clone of this system using some modified software configurations and a
> testing-only data volume, and I've managed to trigger this panic again.
>
> The trigger was exactly the same; I had a bunch of queued emails from
> logcheck because my TLS configuration was wrong, then I fixed the TLS
> configuration and typed "postqueue -f" to send the queued mail.
>
> Ted, since this new iteration has no customer data, passwords, keys, or
> any other private data, I'm going to try to get approval to release an
> exact EC2 image of this system for you to test with, including the fake
> data volume that I triggered the problem on.
>
> If not I can certainly reproduce it now by stopping email delivery and
> generating a lot of fake syslog spam; I can try applying kernel patches
> and report what happens.
>
> Hopefully you're still willing to help out tracking down the problem?
>
> Thanks again!
>
> Cheers,
> Kyle Moffett
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