Date: Sat, 29 Nov 2014 22:38:48 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 195458] Hang on shutdown/root unmount after FreeBSD 10.1R upgrade Message-ID: <bug-195458-8-UnawVvaV3k@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-195458-8@https.bugs.freebsd.org/bugzilla/> References: <bug-195458-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195458 --- Comment #1 from Walter Hop <walter@lifeforms.nl> --- I noticed today that the same problem happens when upgrading from 10.1-RC3 to 10.1-RELEASE, and also on a clean install of 10.1-RELEASE. I did some more digging. As a refresher, the hang didn't occur just when booting the new kernel. It happened only after "freebsd-update install" was executed to replace userland. What is so special about "freebsd-update install" that would trigger the problem? I think the interesting bit might be that it replaced /sbin/init. I can completely reliably trigger a hang on a default 10.1-RELEASE install on UFS2 in VMware Fusion with the following procedure: # chflags noschg /sbin/init # cp -Rp /sbin/init /sbin/init2 # rm -f /sbin/init # mv /sbin/init2 /sbin/init # chflags schg /sbin/init # reboot => Hang after "All buffers synced." I created two clean 10.1 UFS2 installs which both exhibit the problem 100% of trying. I tried doing the same on two clean 10.1 ZFS (auto) installs. ZFS does NOT exhibit the problem so far. I tried disabling softupdates (tunefs -n disable /dev/da0p2) before doing the procedure. In this case, on multiple machines, it also does NOT hang. On 10.0 there's also no problem. So: on FreeBSD 10.1, when using UFS2 with journaled softupdates, replacing init leads to a hang when rebooting/unmounting root afterwards. And a workaround might be to disable softupdates before upgrading to 10.1. -- You are receiving this mail because: You are the assignee for the bug.
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