Re: Coverity down?

2015-10-28 Thread Ulrich Spörlein 
2015-10-28 3:44 GMT+01:00 NGie Cooper :
> On Tue, Oct 27, 2015 at 1:11 PM, Alan Somers  wrote:
>> I just noticed that our last Coverity scan happened on either July-6
>> (according to my inbox) or June-26 (according to Coverity's website).
>> Prior to that, we seemed to get scanned about once per week.  Does
>> anybody know why we haven't been scanned for so long?  I can't figure
>> out what triggers a scan, but it seems like it should've happened by
>> now.
>
> +1
>
> Is it due to svn moving?

No, it's a stupid bug in our crond and/or nslcd and LDAP handling. The
setup is as follows:

- a server running 24/7 with `uqs` being a user ID that is stored in LDAP
- a cronjob is set up to run coverity scan twice a week
- nslcd is running and getent passwd will list all local and LDAP users
- 
- cron somehow no longer sees any of the LDAP users and thus is not
executing any user crontabs, I think this is due to the connection to
nslcd breaking
- restarting crond fixes that (for a while)

So my box was last restarted 94d ago, which was July 26 and it seems
that it even that reboot and cron restart didn't help. I've now put in
a crontab entry, to have cron restart cron daily (no kidding), let's
see if that fixes things.

Though the best option would be to move this off my box, run it with a
local account via cron that should be more robust. Or someone could
fix our cron, because this is really annoying.

Anyway, thanks for letting me know, expect some more coverity runs by
the end of the week!

Cheers,
Uli
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Re: ZFS-related panic: "possible" spa->spa_errlog_lock deadlock

2015-10-28 Thread Fabian Keil 
Xin Li  wrote:

> On 9/7/14 11:23 PM, Fabian Keil wrote:
> > Xin Li  wrote:
> >   
> >> On 9/7/14 9:02 PM, Fabian Keil wrote:  
> >>> Using a kernel built from FreeBSD 11.0-CURRENT r271182 I got
> >>> the following panic yesterday:
> >>> 
> >>> [...] Unread portion of the kernel message buffer: [6880]
> >>> panic: deadlkres: possible deadlock detected for
> >>> 0xf80015289490, blocked for 1800503 ticks  
> >> 
> >> Any chance to get all backtraces (e.g. thread apply all bt full
> >> 16)? I think a different thread that held the lock have been
> >> blocked, probably related to your disconnected vdev.  
> > 
> > Output of "thread apply all bt full 16" is available at: 
> > http://www.fabiankeil.de/tmp/freebsd/kgdb-output-spa_errlog_lock-deadlock.txt
> >
> >  A lot of the backtraces prematurely end with "Cannot access memory
> > at address", therefore I also added "thread apply all bt" output.
> > 
> > Apparently there are at least two additional threads blocking below
> > spa_get_stats():
[...]
> Yes, thread 1182 owned the lock and is waiting for the zio be done.
> Other threads that wanted the lock would have to wait.
> 
> I don't have much clue why the system entered this state, however, as
> the operations should have errored out (the GELI device is gone on
> 21:44:56 based on your log, which suggests all references were closed)
> instead of waiting.

Thanks for the responses.

I finally found the time to analyse the problem which seems
to be that spa_sync() requires at least one writeable vdev to
complete, but holds the lock(s) required to remove or bring back
vdevs.

Letting spa_sync() drop the lock and wait for at least one vdev
to become writeable again seems to make the problem unreproducible
for me, but probably merely shrinks the race window and thus is not
a complete solution.

For details see:
https://www.fabiankeil.de/sourcecode/electrobsd/ZFS-Optionally-let-spa_sync-wait-for-writable-vdev.diff
(Experimental, only lightly tested)

Fabian


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Re: Coverity down?

2015-10-28 Thread Ulrich Spörlein 
[resent to avoid moderator approval]

2015-10-28 11:43 GMT+01:00 Ulrich Spörlein :
> 2015-10-28 3:44 GMT+01:00 NGie Cooper :
>> On Tue, Oct 27, 2015 at 1:11 PM, Alan Somers  wrote:
>>> I just noticed that our last Coverity scan happened on either July-6
>>> (according to my inbox) or June-26 (according to Coverity's website).
>>> Prior to that, we seemed to get scanned about once per week.  Does
>>> anybody know why we haven't been scanned for so long?  I can't figure
>>> out what triggers a scan, but it seems like it should've happened by
>>> now.
>>
>> +1
>>
>> Is it due to svn moving?
>
> No, it's a stupid bug in our crond and/or nslcd and LDAP handling. The
> setup is as follows:
>
> - a server running 24/7 with `uqs` being a user ID that is stored in LDAP
> - a cronjob is set up to run coverity scan twice a week
> - nslcd is running and getent passwd will list all local and LDAP users
> - 
> - cron somehow no longer sees any of the LDAP users and thus is not
> executing any user crontabs, I think this is due to the connection to
> nslcd breaking
> - restarting crond fixes that (for a while)
>
> So my box was last restarted 94d ago, which was July 26 and it seems
> that it even that reboot and cron restart didn't help. I've now put in
> a crontab entry, to have cron restart cron daily (no kidding), let's
> see if that fixes things.
>
> Though the best option would be to move this off my box, run it with a
> local account via cron that should be more robust. Or someone could
> fix our cron, because this is really annoying.
>
> Anyway, thanks for letting me know, expect some more coverity runs by
> the end of the week!
>
> Cheers,
> Uli
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Re: Coverity down?

2015-10-28 Thread Alan Somers 
On Wed, Oct 28, 2015 at 4:43 AM, Ulrich Spörlein  wrote:
> 2015-10-28 3:44 GMT+01:00 NGie Cooper :
>> On Tue, Oct 27, 2015 at 1:11 PM, Alan Somers  wrote:
>>> I just noticed that our last Coverity scan happened on either July-6
>>> (according to my inbox) or June-26 (according to Coverity's website).
>>> Prior to that, we seemed to get scanned about once per week.  Does
>>> anybody know why we haven't been scanned for so long?  I can't figure
>>> out what triggers a scan, but it seems like it should've happened by
>>> now.
>>
>> +1
>>
>> Is it due to svn moving?
>
> No, it's a stupid bug in our crond and/or nslcd and LDAP handling. The
> setup is as follows:
>
> - a server running 24/7 with `uqs` being a user ID that is stored in LDAP
> - a cronjob is set up to run coverity scan twice a week
> - nslcd is running and getent passwd will list all local and LDAP users
> - 
> - cron somehow no longer sees any of the LDAP users and thus is not
> executing any user crontabs, I think this is due to the connection to
> nslcd breaking
> - restarting crond fixes that (for a while)
>
> So my box was last restarted 94d ago, which was July 26 and it seems
> that it even that reboot and cron restart didn't help. I've now put in
> a crontab entry, to have cron restart cron daily (no kidding), let's
> see if that fixes things.
>
> Though the best option would be to move this off my box, run it with a
> local account via cron that should be more robust. Or someone could
> fix our cron, because this is really annoying.
>
> Anyway, thanks for letting me know, expect some more coverity runs by
> the end of the week!
>
> Cheers,
> Uli

Looking forward to it.  Muchas gracias, Ulrich.

-Alan
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Re: 11.0-CURRENT r290039 privileged instruction fault while in kernel mode

2015-10-28 Thread Konstantin Belousov 
On Tue, Oct 27, 2015 at 04:09:28PM -0700, Don Lewis wrote:
> I just got this crash while running poudriere on a freshly upgraded
> 11.0-CURRENT machine.  The instruction pointer value looks pretty
> strange.
> 
> 
> FreeBSD zipper.catspoiler.org 11.0-CURRENT FreeBSD 11.0-CURRENT #30 r290039: 
> Tue Oct 27 00:08:00 PDT 2015 
> d...@zipper.catspoiler.org:/usr/obj/usr/src/sys/GENERIC  amd64
> 
> panic: 
> 
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and you are
> welcome to change it and/or distribute copies of it under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> This GDB was configured as "amd64-marcel-freebsd"...
> 
> Unread portion of the kernel message buffer:
> 
> 
> Fatal trap 1: privileged instruction fault while in kernel mode
> cpuid = 4; apic id = 14
> instruction pointer   = 0x20:0x8240fef5
What is the instruction at the reported address ?

> stack pointer = 0x28:0xfe0859c636c0
> frame pointer = 0x28:0xfe0859c636e0
> code segment  = base 0x0, limit 0xf, type 0x1b
>   = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags  = interrupt enabled, resume, IOPL = 0
> current process   = 0 (zio_free_issue_2_9)
> 
> Reading symbols from /boot/kernel/zfs.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/zfs.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/zfs.ko
> Reading symbols from /boot/kernel/opensolaris.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/opensolaris.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/opensolaris.ko
> Reading symbols from /boot/kernel/geom_mirror.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/geom_mirror.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/geom_mirror.ko
> Reading symbols from /boot/modules/vboxdrv.ko...done.
> Loaded symbols for /boot/modules/vboxdrv.ko
> Reading symbols from /boot/modules/vboxnetflt.ko...done.
> Loaded symbols for /boot/modules/vboxnetflt.ko
> Reading symbols from /boot/kernel/netgraph.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/netgraph.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/netgraph.ko
> Reading symbols from /boot/kernel/ng_ether.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/ng_ether.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/ng_ether.ko
> Reading symbols from /boot/modules/vboxnetadp.ko...done.
> Loaded symbols for /boot/modules/vboxnetadp.ko
> Reading symbols from /boot/kernel/nullfs.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/nullfs.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/nullfs.ko
> Reading symbols from /boot/kernel/linux.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/linux.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/linux.ko
> Reading symbols from /boot/kernel/linux_common.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/linux_common.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/linux_common.ko
> Reading symbols from /boot/kernel/linprocfs.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/linprocfs.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/linprocfs.ko
> Reading symbols from /boot/kernel/tmpfs.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/tmpfs.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/tmpfs.ko
> Reading symbols from /boot/kernel/fdescfs.ko...Reading symbols from 
> /usr/lib/debug//boot/kernel/fdescfs.ko.debug...done.
> done.
> Loaded symbols for /boot/kernel/fdescfs.ko
> #0  doadump (textdump=0) at pcpu.h:221
> 221   pcpu.h: No such file or directory.
>   in pcpu.h
> (kgdb) #0  doadump (textdump=0) at pcpu.h:221
> #1  0x8037c6b6 in db_fncall (dummy1=, 
> dummy2=, dummy3=, 
> dummy4=) at /usr/src/sys/ddb/db_command.c:568
> #2  0x8037c14e in db_command (cmd_table=0x0)
> at /usr/src/sys/ddb/db_command.c:440
> #3  0x8037bee4 in db_command_loop ()
> at /usr/src/sys/ddb/db_command.c:493
> #4  0x8037e97b in db_trap (type=, code=0)
> at /usr/src/sys/ddb/db_main.c:251
> #5  0x80a5fc73 in kdb_trap (type=1, code=0, tf=)
> at /usr/src/sys/kern/subr_kdb.c:654
> #6  0x80e69c81 in trap_fatal (frame=0xfe0859c63610, 
> eva=) at /usr/src/sys/amd64/amd64/trap.c:829
> #7  0x80e69951 in trap (frame=)
> at /usr/src/sys/amd64/amd64/trap.c:203
> #8  0x80e498d7 in calltrap ()
> at /usr/src/sys/amd64/amd64/exception.S:234
> #9  0x8240fef5 in cpu_lock () from /boot/kernel/opensolaris.ko
> #10 0xf804aaeb8000 in ?? ()
> #11 0x0001 in ?? ()
> #12 0xfe0859c63760 in ?? ()
> #13 0x82125325 in vdev_mirror_io_start (zio=0xf8047a6d9000)
> at 
>

Re: [CFT] Buildworld ccache support

2015-10-28 Thread Bryan Drewery 
On 10/27/2015 10:27 PM, Simon J. Gerraty wrote:
> Bryan Drewery  wrote:
>> https://people.freebsd.org/~bdrewery/patches/world-ccache.diff
> 
> In the Junos build - where we used ccache for quite some time
> I did:
> 
> _CC := ${CC}
> CC = ${CCACHE_ENV} ${_CC}
> 
> Since sometimes you want the compiler without ccache - eg when linking.

Yes, I ended up changing the patch significantly to avoid using it for
mkdep and linking.  I moved away from using PATH as well since it is
obscure about whether ccache is being used or not.  I now always modify CC.

> 
> That needs to happen after CC is determined of course.
> 
> If the include of bsd.mkopt.mk were moved to after the inlcude of
> local.sys.env.mk, then you could simply:
> 
> __DEFAULT_NO_OPTIONS+= CCACHE_BUILD
> 
> there or in src.sys.env.mk
> 
>>
>> To use just set WITH_CCACHE_BUILD= in src.conf or make.conf.  I
>> purposely matched it to the same as the ports build.
>>
>> Thanks!


-- 
Regards,
Bryan Drewery



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Re: 11.0-CURRENT r290039 privileged instruction fault while in kernel mode

2015-10-28 Thread Don Lewis 
On 28 Oct, Konstantin Belousov wrote:
> On Tue, Oct 27, 2015 at 04:09:28PM -0700, Don Lewis wrote:
>> I just got this crash while running poudriere on a freshly upgraded
>> 11.0-CURRENT machine.  The instruction pointer value looks pretty
>> strange.
>> 
>> 
>> FreeBSD zipper.catspoiler.org 11.0-CURRENT FreeBSD 11.0-CURRENT #30 r290039: 
>> Tue Oct 27 00:08:00 PDT 2015 
>> d...@zipper.catspoiler.org:/usr/obj/usr/src/sys/GENERIC  amd64
>> 
>> panic: 
>> 
>> GNU gdb 6.1.1 [FreeBSD]
>> Copyright 2004 Free Software Foundation, Inc.
>> GDB is free software, covered by the GNU General Public License, and you are
>> welcome to change it and/or distribute copies of it under certain conditions.
>> Type "show copying" to see the conditions.
>> There is absolutely no warranty for GDB.  Type "show warranty" for details.
>> This GDB was configured as "amd64-marcel-freebsd"...
>> 
>> Unread portion of the kernel message buffer:
>> 
>> 
>> Fatal trap 1: privileged instruction fault while in kernel mode
>> cpuid = 4; apic id = 14
>> instruction pointer  = 0x20:0x8240fef5
> What is the instruction at the reported address ?

(kgdb) disassemble/r
Dump of assembler code for function cpu_lock:
   0x8240fef0 <+0>: 25 bb 40 82 ff  and$0xff8240bb,%eax
=> 0x8240fef5 <+5>: ff  (bad)  
   0x8240fef6 <+6>: ff  (bad)  
   0x8240fef7 <+7>: ff 00   incl   (%rax)
   0x8240fef9 <+9>: 00 71 02add%dh,0x2(%rcx)
   0x8240fefc <+12>:00 00   add%al,(%rax)
   0x8240fefe <+14>:00 00   add%al,(%rax)
   0x8240ff00 <+16>:00 00   add%al,(%rax)
   0x8240ff02 <+18>:00 00   add%al,(%rax)
   0x8240ff04 <+20>:00 00   add%al,(%rax)
   0x8240ff06 <+22>:00 00   add%al,(%rax)
   0x8240ff08 <+24>:01 00   add%eax,(%rax)
   0x8240ff0a <+26>:00 00   add%al,(%rax)
   0x8240ff0c <+28>:00 00   add%al,(%rax)
   0x8240ff0e <+30>:00 00   add%al,(%rax)
End of assembler dump.

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Re: 11.0-CURRENT r290039 privileged instruction fault while in kernel mode

2015-10-28 Thread Konstantin Belousov 
On Wed, Oct 28, 2015 at 10:16:12AM -0700, Don Lewis wrote:
> On 28 Oct, Konstantin Belousov wrote:
> > On Tue, Oct 27, 2015 at 04:09:28PM -0700, Don Lewis wrote:
> >> I just got this crash while running poudriere on a freshly upgraded
> >> 11.0-CURRENT machine.  The instruction pointer value looks pretty
> >> strange.
> >> 
> >> 
> >> FreeBSD zipper.catspoiler.org 11.0-CURRENT FreeBSD 11.0-CURRENT #30 
> >> r290039: Tue Oct 27 00:08:00 PDT 2015 
> >> d...@zipper.catspoiler.org:/usr/obj/usr/src/sys/GENERIC  amd64
> >> 
> >> panic: 
> >> 
> >> GNU gdb 6.1.1 [FreeBSD]
> >> Copyright 2004 Free Software Foundation, Inc.
> >> GDB is free software, covered by the GNU General Public License, and you 
> >> are
> >> welcome to change it and/or distribute copies of it under certain 
> >> conditions.
> >> Type "show copying" to see the conditions.
> >> There is absolutely no warranty for GDB.  Type "show warranty" for details.
> >> This GDB was configured as "amd64-marcel-freebsd"...
> >> 
> >> Unread portion of the kernel message buffer:
> >> 
> >> 
> >> Fatal trap 1: privileged instruction fault while in kernel mode
> >> cpuid = 4; apic id = 14
> >> instruction pointer= 0x20:0x8240fef5
> > What is the instruction at the reported address ?
> 
> (kgdb) disassemble/r
> Dump of assembler code for function cpu_lock:
>0x8240fef0 <+0>:   25 bb 40 82 ff  and$0xff8240bb,%eax
> => 0x8240fef5 <+5>:   ff  (bad)  
>0x8240fef6 <+6>:   ff  (bad)  
>0x8240fef7 <+7>:   ff 00   incl   (%rax)
>0x8240fef9 <+9>:   00 71 02add%dh,0x2(%rcx)
>0x8240fefc <+12>:  00 00   add%al,(%rax)
>0x8240fefe <+14>:  00 00   add%al,(%rax)
>0x8240ff00 <+16>:  00 00   add%al,(%rax)
>0x8240ff02 <+18>:  00 00   add%al,(%rax)
>0x8240ff04 <+20>:  00 00   add%al,(%rax)
>0x8240ff06 <+22>:  00 00   add%al,(%rax)
>0x8240ff08 <+24>:  01 00   add%eax,(%rax)
>0x8240ff0a <+26>:  00 00   add%al,(%rax)
>0x8240ff0c <+28>:  00 00   add%al,(%rax)
>0x8240ff0e <+30>:  00 00   add%al,(%rax)
> End of assembler dump.

Oh, I see. cpu_lock is mutex, dump above demonstrates is cleanly.
Most likely, something overwrote some pointer to a function with
the address.

You probably have to bisect.
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Re: 11.0-CURRENT r290039 privileged instruction fault while in kernel mode

2015-10-28 Thread Don Lewis 
On 28 Oct, Konstantin Belousov wrote:
> On Wed, Oct 28, 2015 at 10:16:12AM -0700, Don Lewis wrote:
>> On 28 Oct, Konstantin Belousov wrote:
>> > On Tue, Oct 27, 2015 at 04:09:28PM -0700, Don Lewis wrote:
>> >> I just got this crash while running poudriere on a freshly upgraded
>> >> 11.0-CURRENT machine.  The instruction pointer value looks pretty
>> >> strange.
>> >> 
>> >> 
>> >> FreeBSD zipper.catspoiler.org 11.0-CURRENT FreeBSD 11.0-CURRENT #30 
>> >> r290039: Tue Oct 27 00:08:00 PDT 2015 
>> >> d...@zipper.catspoiler.org:/usr/obj/usr/src/sys/GENERIC  amd64
>> >> 
>> >> panic: 
>> >> 
>> >> GNU gdb 6.1.1 [FreeBSD]
>> >> Copyright 2004 Free Software Foundation, Inc.
>> >> GDB is free software, covered by the GNU General Public License, and you 
>> >> are
>> >> welcome to change it and/or distribute copies of it under certain 
>> >> conditions.
>> >> Type "show copying" to see the conditions.
>> >> There is absolutely no warranty for GDB.  Type "show warranty" for 
>> >> details.
>> >> This GDB was configured as "amd64-marcel-freebsd"...
>> >> 
>> >> Unread portion of the kernel message buffer:
>> >> 
>> >> 
>> >> Fatal trap 1: privileged instruction fault while in kernel mode
>> >> cpuid = 4; apic id = 14
>> >> instruction pointer   = 0x20:0x8240fef5
>> > What is the instruction at the reported address ?
>> 
>> (kgdb) disassemble/r
>> Dump of assembler code for function cpu_lock:
>>0x8240fef0 <+0>:  25 bb 40 82 ff  and$0xff8240bb,%eax
>> => 0x8240fef5 <+5>:  ff  (bad)  
>>0x8240fef6 <+6>:  ff  (bad)  
>>0x8240fef7 <+7>:  ff 00   incl   (%rax)
>>0x8240fef9 <+9>:  00 71 02add%dh,0x2(%rcx)
>>0x8240fefc <+12>: 00 00   add%al,(%rax)
>>0x8240fefe <+14>: 00 00   add%al,(%rax)
>>0x8240ff00 <+16>: 00 00   add%al,(%rax)
>>0x8240ff02 <+18>: 00 00   add%al,(%rax)
>>0x8240ff04 <+20>: 00 00   add%al,(%rax)
>>0x8240ff06 <+22>: 00 00   add%al,(%rax)
>>0x8240ff08 <+24>: 01 00   add%eax,(%rax)
>>0x8240ff0a <+26>: 00 00   add%al,(%rax)
>>0x8240ff0c <+28>: 00 00   add%al,(%rax)
>>0x8240ff0e <+30>: 00 00   add%al,(%rax)
>> End of assembler dump.
> 
> Oh, I see. cpu_lock is mutex, dump above demonstrates is cleanly.
> Most likely, something overwrote some pointer to a function with
> the address.
> 
> You probably have to bisect.

The could be difficult.  Whatever this is, it seems to be very hard to
trigger.  The machine was up and doing a lot of poudriere package
building for about a day before it crashed.  It's now got close to a day
of uptime again, mostly building packages, without another crash.  The
previous kernel was r289123.


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