> Hi, > > I've noticed that this function first disables the on-demand > initialization, and then runs the kthreads. Doesn't that leave a window > where allocations can fail? The chances are probably small, but I think > it would be better to avoid it completely, rare failures suck. > > Fixing that probably means rethinking the whole synchronization more > dramatically though :/ > > Vlastimil Hi Vlastimil, You are right, there is a window, it is short, and probably not possible to reproduce, as it happens before user threads are started, and after init calls done by smp_init() are finished. The only way it can happen, as far as I can see, is if some device fires an interrupt, and interrupt handler decides to allocate a large chunk of memory. The small allocations will succeed, as zone grow function growth more than strictly requested, and also there are zones without deferred pages. I will, however, think some more how to solve this problem to be future proof. Thank you, Pavel -- 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>
