I have a reproducible panic on my VPS just before powering off or rebooting.Suggesting umounting fs before swapoff? Message of the crash: Waiting (max 60 seconds) for system process `vnlru' to stop... done Waiting (max 60 seconds) for system process `syncer' to stop... Syncing disks, vnodes remaining... 12 12 12 3 1 1 0 0 0 0 done Waiting (max 60 seconds) for system thread `bufdaemon' to stop... done Waiting (max 60 seconds) for system thread `bufspacedaemon-0' to stop... done All buffers synced. swap_pager: I/O error - pagein failed; blkno 3291,size 4096, error 5 panic: swap_pager_force_pagein: read from swap failed cpuid = 0 time = 1559891849 KDB: stack backtrace: #0 0xffffffff80be7977 at kdb_backtrace+0x67 #1 0xffffffff80b9b563 at vpanic+0x1a3 #2 0xffffffff80b9b3b3 at panic+0x43 #3 0xffffffff80ed14bd at swapoff_one+0x80d #4 0xffffffff80ed15e7 at swapoff_all+0x117 #5 0xffffffff80c4905a at bufshutdown+0x2fa #6 0xffffffff80b9aee8 at kern_reboot+0x228 #7 0xffffffff80b9acb1 at sys_reboot+0x411 #8 0xffffffff81075449 at amd64_syscall+0x369 #9 0xffffffff8104fd1d at fast_syscall_common+0x101 Uptime: 20h4m14s Automatic reboot in 15 seconds - press a key on the console to abort Rebooting... /etc/fstab : /dev/ufs/rootfs / ufs rw,userquota,groupquota 0 0 md11 none swap sw,file=/var/swap,late 0 0 swapinfo (upon reboot) : /dev/md11 1572864 0 1572864 0% -- Darui Zhuo <pomoke at typeof.pw> -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 252 bytes Desc: This is a digitally signed message part URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20190715/f7dfca1b/attachment.sig>