------- Comment From [email protected] 2020-09-29 03:27 EDT------- (In reply to comment #166) > I took this from "linux-next" (where it was tagged with 'next-20200923') as: > ~/linux-next$ git show a02b55ea66b9 > commit a02b55ea66b9257744528da609a26279152a3bc3 > Author: Vasily Gorbik <[email protected]> > Date: Wed Sep 23 09:49:28 2020 +1000 > > mm/gup: fix gup_fast with dynamic page table folding > > Currently to make sure that every page table entry is read just once > gup_fast walks perform READ_ONCE and pass pXd value down to the next > gup_pXd_range function by value e.g.: > > static int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end, > unsigned int flags, struct page **pages, int *nr) > ... > > and built a patched groovy and a patched focal kernel, available here: > https://people.canonical.com/~fheimes/lp1896726/ > > Do you have a chance giving these a try?
I'll run a test with my MongoDB setup. Can you provide the debug symbol package for the kernel as well? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896726 Title: [UBUNTU 20.04.1] qemu (secure guest) crash due to gup_fast / dynamic page table folding issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1896726/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
