* Andy Lutomirski <luto@xxxxxxxxxx> wrote: > On Tue, Oct 31, 2017 at 3:32 PM, Dave Hansen > <dave.hansen@xxxxxxxxxxxxxxx> wrote: > > > > Normally, a process just has a NULL mm->context.ldt. But, we > > have a syscall for a process to set a new one. If a process does > > that, we need to map the new LDT. > > > > The original KAISER patch missed this case. > > Tglx suggested that we instead increase the padding at the top of the > user address space from 4k to 64k and put the LDT there. This is a > slight ABI break, but I'd be rather surprised if anything noticed, > especially because the randomized vdso currently regularly lands there > (IIRC), so any user code that explicitly uses those 60k already > collides with the vdso. > > I can make this happen. Yes, let's try that. Thanks, Ingo -- 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>
