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=3D255261 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=3D224295&action= =3Dedit Patch to add a progress indicator for filesystem unmounting at reboot/shutd= own 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 filesyst= ems. 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 unmoun= ting part. (There used to be a related issue with the ZFS kmem freeing also taking a v= ery long time but that fix is included so that part goes quickly when the unmounting part has been passed). --=20 You are receiving this mail because: You are the assignee for the bug.=
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