Test Kernel is available in PPA: https://launchpad.net/~centriq- team/+archive/ubuntu/lp1696165/
Boot tested on Power8: ubuntu@manjo-srutest:~$ uname -a Linux manjo-srutest 4.10.0-22-generic #24~lp1696165+softlockup.1-Ubuntu SMP Wed Jun 14 19:58:24 UTC 20 ppc64le ppc64le ppc64le GNU/Linux Boot tested on AMD64: ubuntu@adib:~$ uname -a Linux adib 4.10.0-22-generic #24~lp1696165+softlockup.1-Ubuntu SMP Wed Jun 14 20:01:20 UTC 20 x86_64 x86_64 x86_64 GNU/Linux ubuntu@adib:~$ -- 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/1696165 Title: [SRU][Zesty] fix soft lockup on overcommited hugepages Status in linux package in Ubuntu: Incomplete Bug description: [Impact] On failing to migrate a page, soft_offline_huge_page() performs the necessary update to the hugepage ref-count. But when !hugepage_migration_supported() , unmap_and_move_hugepage() also decrements the page ref-count for the hugepage. The combined behaviour leaves the ref-count in an inconsistent state. This leads to soft lockups when running the overcommitted hugepage test from mce-tests suite [Testing] Run the mce-test/cases/function/hwpoison/run_hugepage_overcommit.sh and you should see softlock up if hugepage migration support is not enabled. [Fix] upstream commit: 30809f559a0d mm/migrate: fix refcount handling when !hugepage_migration_supported() [Regression Potential] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1696165/+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
