Date: Tue, 24 Oct 2023 16:45:40 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 274698] arc_prune consuming 100% CPU Message-ID: <bug-274698-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274698 Bug ID: 274698 Summary: arc_prune consuming 100% CPU Product: Base System Version: 15.0-CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: markj@FreeBSD.org CC: mav@FreeBSD.org In the past couple of months I see a new problem: ZFS' arc_prune thread will occasionally start consuming a CPU and run for hours. Looking at "vmstat -z | grep taskq", I can see that a huge number of task allocations are pending, and they are slowly draining. It looks like back-to-back calls to arc_evict() can queue up a silly amount of work. The Linux implementation of arc_prune_async() is careful to avoid this problem. -- You are receiving this mail because: You are the assignee for the bug.home | help
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