Date: Tue, 20 Apr 2021 13:49:52 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 255261] Slow unmount of (ZFS) filesystem at reboot time Message-ID: <bug-255261-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255261 Bug ID: 255261 Summary: Slow unmount of (ZFS) filesystem at reboot time Product: Base System Version: 12.2-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: pen@lysator.liu.se Created attachment 224295 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=224295&action=edit Patch to add a progress indicator for filesystem unmounting at reboot/shutdown On a server with about 140000 zfs filesystems a "reboot" sometimes takes a very long (hours) time. Time that is spend by the kernel unmounting the filesystems. Unfortunately the kernel doesn't print any kind of progress indication when this occurs so you just see the "Uptime: xxxx" printed and then nothing... Please find enclosed a patch that adds a progress indication for the unmounting part. (There used to be a related issue with the ZFS kmem freeing also taking a very long time but that fix is included so that part goes quickly when the unmounting part has been passed). -- You are receiving this mail because: You are the assignee for the bug.help
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