[Bug 1845323] Re: Trying to online dasd drive results in invalid input/output from the kernel on z/VM
We are working on a fix. Can you give this testpatch a spin? ** Patch added: "testpatch" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1845323/+attachment/5291775/+files/0001-s390-dasd-Fix-error-handling-during-online-processin.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845323 Title: Trying to online dasd drive results in invalid input/output from the kernel on z/VM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1845323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1556765]
tested and reviewed. applied as 3216:15852 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1556765 Title: Valgrind command valgrind /bin/true shows error To manage notifications about this bug go to: https://bugs.launchpad.net/valgrind/+bug/1556765/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1533646] Re: Could you set vm.allocate_pgste = 1 by default?
My modprobe.conf solution might not work in all cases, as the kvm module might be loaded on demand by a process accessing /dev/kvm. That process then already has 2k page tables. So I agree with Viktor: If we want to support KVM, maybe set vm.allocate_pgste = 1 unconditionally. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1533646 Title: Could you set vm.allocate_pgste = 1 by default? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1533646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1533646] Re: Could you set vm.allocate_pgste = 1 by default?
ok, kvm builtin certainly makes sense if you plan to use it regularly. So in essence its a question about: do we expect a number of users to use KVM in Ubuntu or not? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1533646 Title: Could you set vm.allocate_pgste = 1 by default? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1533646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1533646] Re: Could you set vm.allocate_pgste = 1 by default?
the TCG emulation of QEMU does work without allocatr_pgste. vm.allocate_pgste=1 is necessary to use the KVM kernel module (which is used by qemu in kvm mode) The main difference is that this uses 4k page tables instead of 2k page tables on s390. So enabling pgstes will increase the page table overhead. The difference is usually pretty small, but might become noticeable when you have things like a big database with hundreds of processes accessing a big area of shared memory. Maybe something like # cat /etc/modprobe.d/99-kvm.conf install kvm /sbin/sysctl vm.allocate_pgste=1; /sbin/modprobe --ignore-install kvm remove kvm /sbin/sysctl vm.allocate_pgste=0; /sbin/modprobe -r --ignore-remove kvm would be good enough? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1533646 Title: Could you set vm.allocate_pgste = 1 by default? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1533646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
