(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). https://bugzilla.kernel.org/show_bug.cgi?id=196157 People are still hurting from this. It does seem a pretty major regression for highmem machines. I'm surprised that we aren't hearing about this from distros. Maybe it only affects a subset of highmem machines? Anyway, can we please take another look at it? Seems that we messed up highmem dirty pagecache handling in the 4.2 timeframe. Thanks.
