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- focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
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-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1941829 Title: ubunut_kernel_selftests: memory-hotplug: avoid spamming logs with dump_page() Status in ubuntu-kernel-tests: In Progress Status in linux package in Ubuntu: In Progress Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux-oem-5.13 package in Ubuntu: Invalid Status in linux source package in Bionic: Fix Committed Status in linux-oem-5.10 source package in Bionic: Invalid Status in linux-oem-5.13 source package in Bionic: Invalid Status in linux source package in Focal: Fix Committed Status in linux-oem-5.10 source package in Focal: In Progress Status in linux-oem-5.13 source package in Focal: In Progress Status in linux source package in Hirsute: Fix Committed Status in linux-oem-5.10 source package in Hirsute: Invalid Status in linux-oem-5.13 source package in Hirsute: Invalid Status in linux source package in Impish: In Progress Status in linux-oem-5.10 source package in Impish: Invalid Status in linux-oem-5.13 source package in Impish: Invalid Bug description: [Impact] The memory-hotplug test has been intermittently timing out (or trashing the test VM, see below) on Impish/Hirsute ppc64el and x86-64 for quite some time now. While the offline memory test obey ratio limit, the same test with error injection does not and tries to offline all the hotpluggable memory, spamming system logs with hundreds of thousands of dump_page() entries, slowing system down (to the point the test itself timesout and gets terminated) and excessive fs occupation: ... [ 9784.393354] page:c00c0000007d1b40 refcount:3 mapcount:0 mapping:c0000001fc03e950 index:0xe7b [ 9784.393355] def_blk_aops [ 9784.393356] flags: 0x3ffff800002062(referenced|active|workingset|private) [ 9784.393358] raw: 003ffff800002062 c0000001b9343a68 c0000001b9343a68 c0000001fc03e950 [ 9784.393359] raw: 0000000000000e7b c000000006607b18 00000003ffffffff c00000000490d000 [ 9784.393359] page dumped because: migration failure [ 9784.393360] page->mem_cgroup:c00000000490d000 [ 9784.393416] migrating pfn 1f46d failed ret:1 ... $ grep "page dumped because: migration failure" /var/log/kern.log | wc -l 2405558 $ ls -la /var/log/kern.log -rw-r----- 1 syslog adm 2256109539 Jun 30 14:19 /var/log/kern.log [Fix] * 0c0f6299ba71fa selftests: memory-hotplug: avoid spamming logs with dump_page(), ratio limit hot-remove error test [Test Plan] Run the memory-hotplug test, this log spamming issue should not happen again. [Where problems could occur] If this fix is incorrect we might be unable to catch some other issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1941829/+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
