On Sat, 2020-12-05 at 12:38 +0100, Vitaly Wool wrote: > On Fri, Dec 4, 2020 at 10:47 PM Mike Galbraith <efault@xxxxxx> wrote: > > > > On Fri, 2020-12-04 at 22:04 +0200, Vitaly Wool wrote: > > > Use temporary slots in reclaim function to avoid possible race when > > > freeing those. > > > > > > While at it, make sure we check CLAIMED flag under page lock in the > > > reclaim function to make sure we are not racing with z3fold_alloc(). > > > > > > Signed-off-by: Vitaly Wool <vitaly.wool@xxxxxxxxxxxx> > > > > FYI, with this applied, ltp::mm still crashes the RT kernel, with the > > same rwlock corruption being what takes it down. > > So sad it does, but thanks a lot for the quick response. Thanks for taking a poke at it. Intuitive switch to write_lock() in __release_z3fold_page() "fixed" the darn thing, but staring at it since has yet to inspire a clear "and that works because...". -Mike
