Something in r291926 (and earlier) causes reboots during periodic daily (14 jails on system)

[Karl Denninger]

That's sorta what I expected.....

First thing I'd try -- turn off UMA for ZFS.  It will have a performance
impact but it eliminates one of the issues that I had to do a lot of
work to get around in the patch I developed.

In /boot/loader.conf:

vfs.zfs.zio.use_uma=0

And reboot.

On 12/11/2015 01:56, Alexander Leidinger wrote:
> On Thu, 10 Dec 2015 07:29:03 -0600
> Karl Denninger <karl at denninger.net> wrote:
>
>> On 12/10/2015 05:03, Alexander Leidinger wrote:
>>> On Wed, 9 Dec 2015 15:15:10 -0600
>>> Dustin Wenz <dustinwenz at 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.
>

-- 
Karl Denninger
karl at denninger.net <mailto:karl at denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
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