Joseph, thanks! Kernel from http://kernel.ubuntu.com/~jsalisbury/lp1587091 resolved bug for Xenial, but this bug also affects Trusty and Wily, could you please port patches to them too?
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1587091 Title: Extended statistics from balloon for proper memory management Status in linux package in Ubuntu: Fix Committed Status in linux source package in Xenial: In Progress Status in linux source package in Yakkety: Fix Committed Bug description: There is QEMU/KVM and a Linux OS running inside the guest. Inside the Linux guest a balloon consumes memory in accordance with commands performed on the host side in QEMU and reports some statistics through memstat structure. For the Linux guest reported “free” value doesn’t describe the guest memory pressure at all. The provided patch set in Linux kernel extends the stat with available field. The problem is addressed in mainstream Linux with the following patchset: commit 5057dcd0f1aaad57e07e728ba20a99e205c6b9de Author: Igor Redko <red...@virtuozzo.com> Date: Thu Mar 17 15:09:34 2016 -0700 virtio_balloon: export 'available' memory to balloon statistics Add a new field, VIRTIO_BALLOON_S_AVAIL, to virtio_balloon memory statistics protocol, corresponding to 'Available' in /proc/meminfo. It indicates to the hypervisor how big the balloon can be inflated without pushing the guest system to swap. Signed-off-by: Igor Redko <red...@virtuozzo.com> Signed-off-by: Denis V. Lunev <d...@openvz.org> Reviewed-by: Roman Kagan <rka...@virtuozzo.com> Cc: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> commit d02bd27bd33dd7e8d22594cd568b81be0cb584cd Author: Igor Redko <red...@virtuozzo.com> Date: Thu Mar 17 15:09:34 2016 -0700 mm/page_alloc.c: calculate 'available' memory in a separate function Add a new field, VIRTIO_BALLOON_S_AVAIL, to virtio_balloon memory statistics protocol, corresponding to 'Available' in /proc/meminfo. It indicates to the hypervisor how big the balloon can be inflated without pushing the guest system to swap. This metric would be very useful in VM orchestration software to improve memory management of different VMs under overcommit. This patch (of 2): Factor out calculation of the available memory counter into a separate exportable function, in order to be able to use it in other parts of the kernel. In particular, it appears a relevant metric to report to the hypervisor via virtio-balloon statistics interface (in a followup patch). Signed-off-by: Igor Redko <red...@virtuozzo.com> Signed-off-by: Denis V. Lunev <d...@openvz.org> Reviewed-by: Roman Kagan <rka...@virtuozzo.com> Cc: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1587091/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp