Re: kernel BUG at mm/rmap.c:480 in 2.6.10-rc3-bk7

[Greg KH <greg@kroah.com>]

On Wed, Dec 15, 2004 at 11:48:26PM +0100, Andrea Arcangeli wrote:
> On Wed, Dec 15, 2004 at 08:03:43PM +0100, Andrea Arcangeli wrote:
> > +			if (page->mapping)
> > +				page_remove_rmap(page);
> 
> This had to be page_mapping, since I believe the page->mapping can go
> away with the truncate while the page is still being mapped.
> 
> The rule is that if a page must not be accounted it will never be
> accounted and page_mapping will be always 0. If it has been accounted
> previously, then it must be unaccounted too. This worked fine so far.
> 
> Plus I noticed other goodness that got dropped in the same area from my
> original 2.6.5 patches, and I resurrected those too in sync with SP1
> (I'm talking about the fork path).
>  
> So here an updated patch, please give this one a spin.

No oops with this patch or odd messages in the syslog!  It works fine
for me, thanks a lot.

I'll let the mm developers battle it out to determine if this is a good
fix or not :)

thanks,

greg k-h