On Thu, Oct 13, 2022 at 07:59:52AM -0500, Dean Luick wrote: > Hi Jason, > > I am looking at the FIXME you left in hfi1/user_exp_rcv.c with git commit 3889551db212 > > Link: https://lore.kernel.org/r/20191112202231.3856-7-jgg@xxxxxxxx > > Can you please explain in more detail what made you add the FIXME and what may be "racy"? The comment seems self explanatory, the ordering is upposed to have mmu_interval_read_begin() done before the page tables are read, not after - since we already have a page list at this point it can't be right. Jason
