Andrew, Michal, On Tue, Dec 29, 2015 at 10:30:37AM -0800, Andrew Morton wrote: > On Tue, 29 Dec 2015 17:23:47 +0100 Michal Hocko <mho...@kernel.org> wrote: > > > [CCing Andrew] > > > > On Thu 24-12-15 09:12:53, Jeremiah Mahler wrote: > > > all, > > > > > > I have started seeing a "Bad rss-counter" message in the logs with > > > the latest linux-next 20151222+. > > > > > > [ 458.282192] BUG: Bad rss-counter state mm:ffff8800c5a96000 idx:3 > > > val:3894 > > > > This is MM_SHMEMPAGES so an "unamapped" shmem memory. One possible > > reason might be an unitialized zap_details used from unmap_mapping_range > > during truncate introduced by "mm, oom: introduce oom reaper" from the > > mmotm tree. There is a fix for this which is still pending > > http://lkml.kernel.org/r/1450487091-7822-1-git-send-email-sasha.levin%40oracle.com > > That won't be getting fixed until linux-next returns from holidays. > > This: > > --- a/mm/memory.c~mm-oom-introduce-oom-reaper-fix-5-fix > +++ a/mm/memory.c > @@ -2415,7 +2415,7 @@ static inline void unmap_mapping_range_t > void unmap_mapping_range(struct address_space *mapping, > loff_t const holebegin, loff_t const holelen, int even_cows) > { > - struct zap_details details; > + struct zap_details details = { }; > pgoff_t hba = holebegin >> PAGE_SHIFT; > pgoff_t hlen = (holelen + PAGE_SIZE - 1) >> PAGE_SHIFT; > > _ >
I tested both the patch that Michal mentioned as well as the change that Andrew provided. The both appear to fix the problem on my machine. Thanks for the help :-) -- - Jeremiah Mahler -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
