jemalloc coring in je_bitmap_set

[Paul Marquess]

> > Do you have any feeling whether it is safe to have jemalloc and THP at the same time?
> 
> I've had pretty poor experience with the mixture even within the past month.  The problem is that at some point (under a day of intermittent benchmarking in all the cases I observed) the kernel gets into a fragmented memory state that it cannot recover from without a reboot, and the only obvious indications are decreased performance and increased page faults.

Do you think that disabling madvise with opt.lg_dirty_mult:-1 allows jemalloc & THP to co-exist without causing other unwanted side-effects?

Paul