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Date:      Fri, 11 Dec 2015 08:56:42 +0100
From:      Alexander Leidinger <Alexander@Leidinger.net>
To:        Karl Denninger <karl@denninger.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Something in r291926 (and earlier) causes reboots during periodic daily (14 jails on system)
Message-ID:  <20151211085642.0000652e@Leidinger.net>
In-Reply-To: <56697E1F.6050604@denninger.net>
References:  <20151209090049.000003db@Leidinger.net> <5667E86F.3050906@quip.cz> <20151209105144.000035be@Leidinger.net> <3923D6D6-E907-4B6C-931A-12CD7B863415@ebureau.com> <20151210120326.00005928@Leidinger.net> <56697E1F.6050604@denninger.net>

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On Thu, 10 Dec 2015 07:29:03 -0600
Karl Denninger <karl@denninger.net> wrote:

> On 12/10/2015 05:03, Alexander Leidinger wrote:
> > On Wed, 9 Dec 2015 15:15:10 -0600
> > Dustin Wenz <dustinwenz@ebureau.com> wrote:
> >  
> >> Are you by chance using the ARC patch from this PR?
> >>
> >> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594  
> > No (despite the fact that I would like to have it hit the tree).
> >  
> >> Do you have a vfs.zfs.dynamic_write_buffer tunable defined, if so,
> >> what is it set to?  
> > No.
> >
> > Bye,
> > Alexander.
> >  
> Wait a minute... you have a panic coming out of running the periodic
> jobs and you do _*not*_ have the patch loaded?  Got a dump available
> from that?
> 

To make it explicit about what is patched on this system or not:
# svnlite status
M       etc/rc.d/localpkg
M       lib/libc/Makefile
M       lib/libutil/Makefile
M       lib/msun/Makefile
M       libexec/rtld-elf/Makefile
M       sbin/dump/dumprmt.c
M       sbin/dump/itime.c
M       sbin/dump/optr.c
M       sbin/dump/tape.c
M       sbin/restore/dirs.c
M       sbin/restore/symtab.c
M       sbin/restore/tape.c
?       sys/amd64/conf/ANDROMEDA
M       sys/dev/drm/drmP.h
M       sys/dev/e1000/if_igb.c
M       sys/dev/usb/serial/ulpt.c
M       sys/fs/cd9660/cd9660_vfsops.c
M       sys/fs/msdosfs/msdosfs_vfsops.c
M       sys/fs/smbfs/smbfs_vfsops.c
M       sys/fs/udf/udf_vfsops.c
M       sys/fs/unionfs/union_vfsops.c
M       sys/gnu/fs/reiserfs/reiserfs_vfsops.c
M       sys/kern/kern_jail.c
M       sys/kern/kern_sig.c
M       sys/kern/subr_bus.c
M       sys/sys/jail.h
M       usr.sbin/adduser/adduser.sh
M       usr.sbin/adduser/rmuser.sh
M       usr.sbin/nfsd/nfsd.c
M       usr.sbin/watchdogd/Makefile

Unfortunately I don't have a dump. Every crash so far didn't lead to a
core in the dump device (the thread on stable has a stacktrace:
https://lists.freebsd.org/pipermail/freebsd-stable/2015-December/083807.html).
No idea why I don't get a dump.

# grep dump /etc/rc.conf /boot/loader.conf
/etc/rc.conf:dumpdev="/dev/ada3p2"
/boot/loader.conf:dumpdev="/dev/ada3p2"

# savecore -C /dev/ada3p2

# ll /var/crash
total 9
-rw-r--r--  1 root  wheel     3B Nov 11 08:45 bounds
-rw-r--r--  1 root  wheel     5B Apr 28  2011 minfree

Bye,
Alexander.

-- 
http://www.Leidinger.net Alexander@Leidinger.net: PGP 0xC773696B3BAC17DC
http://www.FreeBSD.org    netchild@FreeBSD.org  : PGP 0xC773696B3BAC17DC



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