On 06/16/2017 11:22 PM, Laurent Dufour wrote: > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > One of the side effects of speculating on faults (without holding > mmap_sem) is that we can race with free_pgtables() and therefore we > cannot assume the page-tables will stick around. > > Remove the relyance on the pte pointer. Looking into other parts of the series, it seemed like now we have sequence lock both at MM and VMA level but then after that we still need to take page table lock before handling page faults (in turn manipulating PTE which includes swap in paths as well). Is not that true ? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
