On May 26, 2015, at 1:47 AM, Catalin Marinas wrote: > On 25 May 2015, at 13:01, Jungseok Lee <jungseoklee85@xxxxxxxxx> wrote: > >>> Could the stack size be reduced to 8KB perhaps? >> >> I guess probably not. >> >> A commit, 845ad05e, says that 8KB is not enough to cover SpecWeb benchmark. > > We could go back to 8KB stacks if we implement support for separate IRQ > stack on arm64. It's not too complicated, we would have to use SP0 for (kernel) threads > and SP1 for IRQ handlers. Definitely interesting. It looks like there are two options based on discussion. 1) Reduce the stack size with separate IRQ stack scheme 2) Figure out a generic anti-fragmentation solution Do I miss anything? I am still not sure about the first scheme as reviewing Minchan's findings repeatedly, but I agree that the item should be worked actively. Best Regards Jungseok Lee -- 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