On Thu, Apr 07, 2016 at 03:11:24PM +0300, Dmitry Safonov wrote: > On 04/06/2016 09:04 PM, Andy Lutomirski wrote: > >[cc Dave Hansen for MPX] > > > Will add x32 support for v2. > >I think that you should separate vdso remapping from "personality". > >vdso remapping should be available even on native 32-bit builds, which > >means that either you can't use arch_prctl for it or you'll have to > >wire up arch_prctl as a 32-bit syscall. > I cant say, I got your point. Do you mean by vdso remapping > mremap for vdso/vvar pages? I think, it should work now. > I did remapping for vdso as blob for native x86_64 task differs > to compatible task. So it's just changing blobs, address value > is there for convenience - I may omit it and just remap > different vdso blob at the same place where was previous vdso. > I'm not sure, why do we need possibility to map 64-bit vdso blob > on native 32-bit builds? First of all, thanks a huge for all your comments, Andy! Dima, I'm not seeing in patch, don't you have to take mm::mmap_sem when walking over VMAs? Cyrill -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
