Date: Mon, 2 Apr 2018 20:44:18 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: markk@knigma.org, freebsd-stable@freebsd.org Subject: Re: FreeBSD 10.4 kernel breaks on i7-7700 / PRIME H270M-PLUS Message-ID: <5AC233B2.2050805@grosbein.net> In-Reply-To: <3c184bf8-8651-22a7-a040-8260b44647da@knigma.org> References: <f27aec4a-2b9d-4722-df7b-afb01b90f098@knigma.org> <5AC1C628.6030309@grosbein.net> <3c184bf8-8651-22a7-a040-8260b44647da@knigma.org>
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On 02.04.2018 19:27, Mark Knight wrote: >> What does it show if you press "CTRL-T" to see a status of "hung" process? > > Typically CTRL-T shows [sysctl mem]. In some circumstances I can CTRL-C > (e.g. if su hangs), in others I cannot (e.g. with sudo). > >> Does it help if you comment out the line mentioning /dev/console in the /etc/syslog.conf >> and apply the change with killall -1 syslogd ? > > Doing that "killall -HUP syslogd" hangs with (sysctl mem) - as does > "service syslogd restart" but after a fresh reboot, no - removing that > line didn't help at all. Thanks for getting my hopes up :) > > Moving ~/myuser/.bashrc out of the way (it really doesn't contain much > apart from setting a bunch of aliases), allows me to login as myself, > but "sudo -u myuser -s" still hangs. > > I just got a truss output of "sudo -u myuser -s" per the file below, > perhaps that contains a clue? > > # sudo -u myuser -s >& sudo.truss.log > > http://www.knigma.org/scratch/sudo.truss.log > > Flipping back to a 10.3 kernel makes everything happy (just as well, as > the machine in question is my main router/firewall, so it's a right pain > when it's not working). > > Thanks in advance for any fresh ideas; I'm really not sure where to go > with this! 1. Make sure you have kernel dumps enabled. Verify that dump can be properly generated and saved after reboot using "sysctl debug.kdb.panic=1" (this produced a panic). You should have crashdump in /var/crash after reboot. 2. Rebuild kernel using new updated sources but this time add to its config file: options KDB # Enable kernel debugger support. options KDB_UNATTENDED options KDB_TRACE options DDB # Support DDB. options GDB # Support remote GDB. options INVARIANTS # Enable calls of extra sanity checking options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS options WITNESS # Enable checks to detect deadlocks and cycles options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed 3. Boot new kernel using nextboot(8) and see if it will crash instead of deadlock and if so, fill the PR to Bugzilla.home | help
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