This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- zesty' to 'verification-done-zesty'. If the problem still exists, change the tag 'verification-needed-zesty' to 'verification-failed-zesty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-zesty -- 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 Status in linux source package in Zesty: Fix Committed 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
