Re: HEADS up on VM fix now in stable

[Julian Elischer <julian@xxxxxxxxxxxx>]

What corruption would you see?


Matthew Dillon wrote:
>     David Rhodus and I finally tracked down the dogged filesystem corruption
>     and 'page not found in hash' panics that he has been getting for over
>     a year.  The fix has been committed and the DragonFly_Stable tag slipped
>     for it.  The bug was in contigmalloc() and particularly hit by people
>     using the 'twe' driver, not through any fault of the driver which is
>     why we were never able to find the problem before.
>
>     Anyone with weird random occassional filesystem corruption or 'page not
>     found in hash' panics should cvsup and get the latest stable, and the
>     problem should go away.  The bug was inherited from FreeBSD-4 and even
>     FreeBSD-5 still had a portion of the buggy code in place (though it may
>     have been masked by other work done in FreeBSD-5).
>
>     Many thanks to David Rhodus for providing the many kernel cores (dozens
>     over the last year) related to this bug.
>
>     This bug is believed to have been the cause of *all* known occassdional
>     filesystem and/or VM corruption issues in DragonFly so it is with great
>     relief that we've finally been able to track it down and fix it.
>
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@xxxxxxxxxxxxx>