‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Monday, July 15, 2019 11:25 PM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). Roger that. > > On Sat, 13 Jul 2019 19:20:21 +0000 bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=204165 > > > > Bug ID: 204165 > > Summary: 100% CPU usage in compact_zone_order > > > > Looks like we have a lockup in compact_zone() > > > Product: Memory Management > > Version: 2.5 > > Kernel Version: 5.2.0-g0ecfebd2b524 > > Hardware: x86-64 > > OS: Linux > > Tree: Mainline > > Status: NEW > > Severity: normal > > Priority: P1 > > Component: Page Allocator > > Assignee: akpm@xxxxxxxxxxxxxxxxxxxx > > Reporter: howaboutsynergy@xxxxx > > Regression: No > > > > I assume this should be "yes". Did previous kernels exhibit this > behavior or is it new in 5.2? Regression: yes? I'm not sure... tl;dr: seen with kernel linux-stable 5.1.8.r0.g937cc0cc22a2-1 And really not sure if I've seen it before. long read: At least one previous kernel did because I've seen this before in https://bugzilla.kernel.org/show_bug.cgi?id=203833#c1 where I thought it was due to 'teo' governor but it wasn't (I'm using 'menu' gov. now) I didn't mention kernel version there, but according to irc logs where I seek'd help at the time, the date was June 10th 2019 3am, checking which kernel I was running at the time (thanks to my q1q repo. git logs) it was 5.1.8 (stable)kernel to which I updated on Sun Jun 9 10:50:09 2019 +0200 and have not changed until Tue Jun 11 05:16:59 2019 +0200 local/linux-stable 5.1.8.r0.g937cc0cc22a2-1 (builtbydaddy) Side note: I've encountered something similar here https://github.com/constantoverride/qubes-linux-kernel/issues/2 where kworker would randomly start using 100% CPU and couldn't be killed. The kernel there was 4.18.7, the VM had very little RAM in Qubes there. Since it's probably a different bug due to that stacktrace being so different/unrelated, please ignore.
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