Test kernel: https://kernel.ubuntu.com/~mhcerri/lp1812728_v1/
Patchset on the mailing list: https://lists.ubuntu.com/archives/kernel- team/2019-January/098018.html ** No longer affects: linux-gcp (Ubuntu Xenial) ** Changed in: linux-gcp (Ubuntu Bionic) Status: New => In Progress ** Changed in: linux-gcp (Ubuntu Bionic) Assignee: (unassigned) => Marcelo Cerri (mhcerri) -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1812728 Title: linux-gcp: Reduce boot latency due to RAID6_PQ Status in linux-gcp package in Ubuntu: In Progress Status in linux-gcp source package in Bionic: In Progress Bug description: For an n1-standard-2 with ubuntu-1604, we spend around 600 milliseconds during boot on computing the best raid6 recovery algorithm seen in the following lines of the kernel logs: ... [ 2.216022] raid6: sse2x1 gen() 8570 MB/s [ 2.264029] raid6: sse2x1 xor() 6467 MB/s [ 2.312030] raid6: sse2x2 gen() 10602 MB/s [ 2.360021] raid6: sse2x2 xor() 6999 MB/s [ 2.412028] raid6: sse2x4 gen() 12483 MB/s [ 2.464022] raid6: sse2x4 xor() 8607 MB/s [ 2.516024] raid6: avx2x1 gen() 16712 MB/s [ 2.568020] raid6: avx2x1 xor() 12050 MB/s [ 2.620019] raid6: avx2x2 gen() 19393 MB/s [ 2.672024] raid6: avx2x2 xor() 12406 MB/s [ 2.724034] raid6: avx2x4 gen() 22330 MB/s [ 2.776029] raid6: avx2x4 xor() 15196 MB/s [ 2.780440] raid6: using algorithm avx2x4 gen() 22330 MB/s [ 2.786035] raid6: .... xor() 15196 MB/s, rmw enabled [ 2.791196] raid6: using avx2x2 recovery algorithm ... It would be desirable to reduce or eliminate this delay. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-gcp/+bug/1812728/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : [email protected] Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
