Date: Fri, 21 Apr 2023 14:23:28 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 270975] [hang] system hangs with heavy io and regular syncing Message-ID: <bug-270975-227-ruVRwDhBCz@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-270975-227@https.bugs.freebsd.org/bugzilla/> References: <bug-270975-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270975 Daniel Ebdrup Jensen <debdrup@freebsd.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |debdrup@freebsd.org --- Comment #1 from Daniel Ebdrup Jensen <debdrup@freebsd.org> --- It sounds to me like console interactivity is being completely overloaded as there are simply no spare cycles - as such, I'm not sure this is a bug, as FreeBSD is doing what it's been told to do. I once manged to do the exact same on a production system, and solved it by using top -q as root to identify the process and kill it - but it took 3 da= ys of waiting on the login prompt to finish, and ssh never managed to work. The kern.sched MIB in sysctl(8) has some control over interactivity and threshold scores that you can try tweaking to improve this if you can't bea= r to shut down the system to fix the issue. As an alternative, you can use cpuset(8) and/or rctl(8) to limit which cores your CPUs are running on and/or how much cputime they get, which should fre= e up cycles for the system to be a little interactive. If you want help with something, a bug tracker isn't the best place for it - stop by #FreeBSD on Libera, it's possible that there's someone that can help you rootcause the issue. For reference, there's documentation on how to write a good bug report once you've figured out the exact issue: https://docs.freebsd.org/en/articles/problem-reports/ --=20 You are receiving this mail because: You are the assignee for the bug.=
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