cvs commit: src/sys/kern vfs_bio.c

[Peter Edwards]

On 9/29/05, Pawel Jakub Dawidek <pjd at freebsd.org> wrote:
> On Thu, Sep 29, 2005 at 10:37:20AM +0000, Peter Edwards wrote:
> +> peadar      2005-09-29 10:37:20 UTC
> +>
> +>   FreeBSD src repository
> +>
> +>   Modified files:
> +>     sys/kern             vfs_bio.c
> +>   Log:
> +>   Close a race in biodone(), whereby the bio_done field of the passed
> +>   bio may have been freed and reassigned by the wakeup before being
> +>   tested after releasing the bdonelock.
> +>
> +>   There's a non-zero chance this is the cause of a few of the crashes
> +>   knocking around with biodone() sitting in the stack backtrace.
>
> Should this fix the panic on boot in vmware?
>

That one falls under the "non-zero chance" mentioned above :-) The
problem was very intermittent for me, and wanting the laptop not to
fall over seemed to be a prerequisite to reproducing the panic, so I
can't positively say it's fixed the problem yet.

If you have a reliable way of reproducing the panic, can you try out
the patch and let me know?