head -r338804 boots threadripper 1950X fine; head -r338810+ do not; -r338807 seems implicated
Toomas Soome
tsoome at me.com
Mon Oct 22 11:07:43 UTC 2018
> On 22 Oct 2018, at 13:58, Mark Millard <marklmi at yahoo.com> wrote:
>
> On 2018-Oct-22, at 2:27 AM, Toomas Soome <tsoome at me.com <http://me.com/>> wrote:
>>
>>> On 22 Oct 2018, at 06:30, Warner Losh <imp at bsdimp.com> wrote:
>>>
>>> On Sun, Oct 21, 2018 at 9:28 PM Warner Losh <imp at bsdimp.com> wrote:
>>>
>>>>
>>>>
>>>> On Sun, Oct 21, 2018 at 8:57 PM Mark Millard via freebsd-stable <
>>>> freebsd-stable at freebsd.org> wrote:
>>>>
>>>>> [I built based on WITHOUT_ZFS= for other reasons. But,
>>>>> after installing the build, Hyper-V based boots are
>>>>> working.]
>>>>>
>>>>> On 2018-Oct-20, at 2:09 AM, Mark Millard <marklmi at yahoo.com> wrote:
>>>>>
>>>>>> On 2018-Oct-20, at 1:39 AM, Mark Millard <marklmi at yahoo.com> wrote:
>>>>>>
>>>>>>> I attempted to jump from head -r334014 to -r339076
>>>>>>> on a threadripper 1950X board and the boot fails.
>>>>>>> This is both native booting and under Hyper-V,
>>>>>>> same machine and root file system in both cases.
>>>>>>
>>>>>> I did my investigation under Hyper-V after seeing
>>>>>> a boot failure native.
>>>>>>
>>>>>> Looks like the native failure is even earlier,
>>>>>> before db> is even possible, possibly during
>>>>>> early loader activity.
>>>>>>
>>>>>> So this report is really for running under
>>>>>> Hyper-V: -r338804 boots and -r338810 does
>>>>>> not. By contrast -r334804 does not boot native.
>>>>>> (But I've little information for that context.)
>>>>>>
>>>>>> Sorry for the confusion. I rushed the report
>>>>>> in hopes of getting to sleep. It was not to be.
>>>>>>
>>>>>>> It fails just after the FreeBSD/SMP lines,
>>>>>>> reporting "kernel trap 9 with interrupts disabled".
>>>>>>>
>>>>>>> It fails in pmap_force_invaldiate_cache_range at
>>>>>>> a clflusl (%rax) instruction that produces a
>>>>>>> "Fatal trap 9: general protection fault while
>>>>>>> in kernel mode". cpudid=0 apic id= 00
>>>>>>>
>>>>>>> I used kernel.txz files from:
>>>>>>>
>>>>>>> https://artifact.ci.freebsd.org/snapshot/head/r*/amd64/amd64/
>>>>>>>
>>>>>>> to narrow the range of kernel builds for working -> failing
>>>>>>> and got:
>>>>>>>
>>>>>>> -r338804 boots fine
>>>>>>> (no amd64 kernel builds between to try)
>>>>>>> -r338810+ fails (any that I tried, anyway)
>>>>>>>
>>>>>>> In that range is -r338807 :
>>>>>>>
>>>>>>> QUOTE
>>>>>>> Author: kib
>>>>>>> Date: Wed Sep 19 19:35:02 2018
>>>>>>> New Revision: 338807
>>>>>>> URL:
>>>>>>> https://svnweb.freebsd.org/changeset/base/338807
>>>>>>>
>>>>>>>
>>>>>>> Log:
>>>>>>> Convert x86 cache invalidation functions to ifuncs.
>>>>>>>
>>>>>>> This simplifies the runtime logic and reduces the number of
>>>>>>> runtime-constant branches.
>>>>>>>
>>>>>>> Reviewed by: alc, markj
>>>>>>> Sponsored by: The FreeBSD Foundation
>>>>>>> Approved by: re (gjb)
>>>>>>> Differential revision:
>>>>>>> https://reviews.freebsd.org/D16736
>>>>>>>
>>>>>>> Modified:
>>>>>>> head/sys/amd64/amd64/pmap.c
>>>>>>> head/sys/amd64/include/pmap.h
>>>>>>> head/sys/dev/drm2/drm_os_freebsd.c
>>>>>>> head/sys/dev/drm2/i915/intel_ringbuffer.c
>>>>>>> head/sys/i386/i386/pmap.c
>>>>>>> head/sys/i386/i386/vm_machdep.c
>>>>>>> head/sys/i386/include/pmap.h
>>>>>>> head/sys/x86/iommu/intel_utils.c
>>>>>>> END QUOTE
>>>>>>>
>>>>>>> There do seem to be changes associated with
>>>>>>> clflush(...) use. Looking at:
>>>>>>>
>>>>>>>
>>>>> https://svnweb.freebsd.org/base/head/sys/amd64/amd64/pmap.c?annotate=339432
>>>>>>>
>>>>>>> it appears that pmap_force_invalidate_cache_range has not
>>>>>>> changed since -r338807.
>>>>>>>
>>>>>>> It seems that -r338806 and -r3388810 would be unlikely
>>>>>>> contributors.
>>>>>>
>>>>>
>>>>> I went after my native-boot loader problem first because I
>>>>> could switch kernels via the loader for booting FreeBSD under
>>>>> Hyper-V. Switching loaders is more of a problem.
>>>>>
>>>>> In order to avoid the loader-time crash I switched to building
>>>>> installing based on WITHOUT_ZFS= . I've had no active use of
>>>>> ZFS in years. (The old official-build loaders that worked were
>>>>> non-ZFS ones.)
>>>>>
>>>>> This took care of the native-boot loader-crash --and, to my
>>>>> surprise, also the Hyper-V-boot kernel-time crash.
>>>>>
>>>>> My private builds now boot the 1950X in both contexts just
>>>>> fine.
>>>>>
>>>>> During my early investigation I did pick up specific changes
>>>>> from after -r339076 that seemed to be tied to Ryzen and such.
>>>>> (They made no difference to the boot problems at the time
>>>>> but I saw no reason to remove them.)
>>>>>
>>>>> # uname -apKU
>>>>> FreeBSD FBSDFSSD 12.0-ALPHA8 FreeBSD 12.0-ALPHA8 #5 r339076:339432M: Sun
>>>>> Oct 21 16:44:25 PDT 2018 markmi at FBSDFSSD:/usr/obj/amd64_clang/amd64.amd64/usr/src/amd64.amd64/sys/GENERIC-NODBG
>>>>> amd64 amd64 1200084 1200084
>>>>
>>>>
>>> (stupid gmail)
>>>
>>> The phrase "no active use" bothers me. What does that mean? Are there any
>>> ZFS pools or any disks that any whiff of ZFSish thing on it at all?
>>> Clearly, there's something in the zfs boot loader that's freaking out by
>>> something on your system, but absent that information I can't help you.
>>>
>>
>> It would help to get output from loader lsdev -v command.
>
> That turned out to be very interesting: The non-ZFS loader
> crashes during the listing, during disk8, which shows a
> x0 instead of a x512.
>
Yes, thats the root cause there. The non-zfs loader does only *read* the boot disk, thats why the issue was not revealed there.
It would help to identify the sector size for that disk, at least from OS, so we can compare with what we can get from INT13.
I have pretty good idea what to look there, but I am afraid we need to run few tests with you to understand why that disk is reporting sector size 0 there.
rgds,
toomas
> Hand transcribed from pictures:
>
> OK lsdev -v
> disk devices
> disk0: BIOS drive C (937703088 x 512):
> disk0p1: FreeBSD boot 512K
> disk0p2: FreeBSD UFS 356G
> disk0p3: FreeBSD swap 15G
> disp0p4: FreeBSD swap 76G
> disk1: BIOS drive D (16514064 x 512):
> disk1s1: Linux 2048KB
> disk1s2: Unknown 952GB
> disk2: BIOS drive E (16514064 x 512):
> disk2p1: Unknown 128MB
> disk3: BIOS drive F (16514064 x 512):
> disk3p1: Unknown 128MB
> disk4: BIOS drive G (16434495 x 512):
> disk2p1: Unknown 128MB
> disk4p2: DOS/Windwos 1716GB
> disk5: BIOS drive H (16434495 x 512):
> disk5p1: FreeBSD boot 512K
> disk5p2: FreeBSD UFS 176G
> disk5p3: FreeBSD swap 193G
> disp5p4: FreeBSD swap 15G
> disk6: BIOS drive I (16434495 x 512):
> disk6p1: Unknown 499MB
> disk6p2: EFI 99MB
> disk6p3: Unknown 16MB
> disp6p4: DOS/Windows 886G
> dis7: BIOS drive H (16434495 x 512):
> disk7p1: FreeBSD boot 512K
> disk7p2: FreeBSD UFS 953G
> disk8: BIOS drive K (262144 x 0):
>
> int=00000000 err=00000000 efl=00010246 eip=000286bd
> eax=00000000 ebx=72b50430 ecx=00000000 edx=00000000
> esi=00000000 edi=00092080 ebp=00091eec esp=00091ea8
> cs=002b ds=0033 es=0033 fs=0033 gs=0033 ss=0033
> cs:eip=f7 f1 89 c1 85 d2 0f 85-d8 01 00 00 6a 05 58 85
> f6 0f 88 75 01 00 00 <tel:88%2075%2001%2000%2000> 89-cb c1 fb 1f 89 ca 03 55
> ss:esp=09 00 00 00 00 00 00 <tel:09%2000%2000%2000%2000%2000%2000> 00-0a 00 00 00 02 00 00 00 <tel:00%2000%2000%2002%2000%2000%2000>
> 00 00 00 00 00 00 00 <tel:00%2000%2000%2000%2000%2000%2000> 00-78 1f 09 00 33 45 04 00 <tel:09%2000%2033%2045%2004%2000>
> BTX halted
>
> I expect that "disk8" is what gpart show -p
> from a native boot showed as:
>
> => 1 60062499 da1 MBR (29G)
> 1 31 - free - (16K)
> 32 60062468 <tel:32%20%C2%A060062468> da1s1 fat32lba (29G)
>
> (That gpart show -p output is in another of the
> list messages.)
>
>> Also if you could test boot loader with UEFI - for example get to loader prompt via usb/cd boot and then get the same lsdev -v output.
>
> Still true given the above crash? Or, going the
> other way, should "drive8" be left as it is in
> order to be sure to do this test with the drive
> present?
>
> If I do this test later, it will take a bit to
> get media to do it with. (It is about 4AM in the
> morning and I've yet to get to sleep.)
>
> Note: I've never tried a UEFI based boot of FreeBSD
> on this machine (but the Windows 10 Pro x64 is EFI
> based). The only FreeBSD context using a EFI partition
> to boot that I have used is on an arm aarch64
> Cortex-A57 system.
>
>> I would be interested to see the sector size information and if the UEFI loader does also have issues.
>
> Understood.
>
>> If it does, I’d like to see the outputs from commands:
>
>> zpool status
>> zpool import
>
> Independent of the UEFI test . . .
>
> I do have a -r331924 head version on another one
> of the devices and can native-boot that. It still
> has its ZFS software (but a default loader without
> ZFS).
>
> Trying from that context, hand transcribed:
>
> # zpool status
> ZFS filesystem version: 5
> ZFS storage pool version: features support (5000)
> no pools available
> # zpool import
> #
>
> [That was based on the old (default) loader being
> a non-ZFS one.]
>
>
> ===
> Mark Millard
> marklmi at yahoo.com <http://yahoo.com/>
> ( dsl-only.net <http://dsl-only.net/> went
> away in early 2018-Mar)
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