On Wed, Aug 30, 2023 at 8:08 AM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Wed, Aug 30, 2023 at 11:03:59AM +0000, Joel Fernandes (Google) wrote: > > It is unsafe to dump vmalloc area information when trying to do so from > > some contexts. Add a safer trylock version of the same function to do a > > best-effort VMA finding and use it from vmalloc_dump_obj(). > > > > Reported-by: Zhen Lei <thunder.leizhen@xxxxxxxxxxxxxxx> > > Cc: Paul E. McKenney <paulmck@xxxxxxxxxx> > > Cc: rcu@xxxxxxxxxxxxxxx > > Cc: Zqiang <qiang.zhang1211@xxxxxxxxx> > > Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> > > Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Thanks! > I once started writing something similar, but got distracted and the > immediate problem got solved a different way. > > It does make me wonder if we couldn't make this tree RCU-safe, but > that's obviously a much larger job. Yes, that would be nice. - Joel
