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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1400209 Title: KVM: PPC: BOOK3S: HV: CMA: Reserve cma region only in hypervisor mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400209/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
