Sent SRU request to kernel team mailing list for U/T. ** Description changed:
+ SRU Justification: + [Impact] + KVM guests on PowerNV allocate memory for CMA in kvm_cma_reserve unnecessarily leading to additional memory consumption. + + [Test Case] + Boot a KVM guest on PowerNV and measure the differences in memory consumption with and without this patch. + + [Fix] + commit cec26bc3c125b5dd12a02f04133cd91eae3f1622 upstream + in v3.18-rc1 + + -- + Problem Description ================== - This bugzilla is opened to track the inclusion of the upstream commit mentioned below: + This bugzilla is opened to track the inclusion of the upstream commit mentioned below: commit cec26bc3c125b5dd12a02f04133cd91eae3f1622 Author: Aneesh Kumar K.V <[email protected]> Date: Mon Sep 29 13:32:38 2014 +0530 - KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode - - We use cma reserved area for creating guest hash page table. - Don't do the reservation in non-hypervisor mode. This avoids unnecessary - CMA reservation when booting with limited memory configs like - fadump and kdump. - + KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor + mode + + We use cma reserved area for creating guest hash page table. + Don't do the reservation in non-hypervisor mode. This avoids unnecessary + CMA reservation when booting with limited memory configs like + fadump and kdump. + ---uname output--- ubuntu14.10 - + Machine Type = ppc64 -- 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/1400209 Title: KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode Status in linux package in Ubuntu: Fix Released Status in linux source package in Trusty: In Progress Status in linux source package in Utopic: In Progress Bug description: SRU Justification: [Impact] KVM guests on PowerNV allocate memory for CMA in kvm_cma_reserve unnecessarily leading to additional memory consumption. [Test Case] Boot a KVM guest on PowerNV and measure the differences in memory consumption with and without this patch. [Fix] commit cec26bc3c125b5dd12a02f04133cd91eae3f1622 upstream in v3.18-rc1 -- Problem Description ================== This bugzilla is opened to track the inclusion of the upstream commit mentioned below: commit cec26bc3c125b5dd12a02f04133cd91eae3f1622 Author: Aneesh Kumar K.V <[email protected]> Date: Mon Sep 29 13:32:38 2014 +0530 KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode We use cma reserved area for creating guest hash page table. Don't do the reservation in non-hypervisor mode. This avoids unnecessary CMA reservation when booting with limited memory configs like fadump and kdump. ---uname output--- ubuntu14.10 Machine Type = ppc64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400209/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
