On Tue, 15 Jan 2019, Jason Gunthorpe wrote:
On Tue, Jan 15, 2019 at 01:12:07PM -0800, Matthew Wilcox wrote:On Tue, Jan 15, 2019 at 08:53:16PM +0000, Jason Gunthorpe wrote: > > - new_pinned = atomic_long_read(&mm->pinned_vm) + npages; > > + new_pinned = atomic_long_add_return(npages, &mm->pinned_vm); > > if (new_pinned > lock_limit && !capable(CAP_IPC_LOCK)) { > > I thought a patch had been made for this to use check_overflow... That got removed again by patch 1 ...Well, that sure needs a lot more explanation. :(
What if we just make the counter atomic64? Thanks, Davidlohr
