Please run with only 1 vcpu for the next couple of weeks.

Thanks,
Kip

On Wed, Feb 4, 2009 at 2:20 AM, Kai Mosebach <k...@freshx.de> wrote:
> Hi Kip,
>
> After rebuilding the kernel (which improved stability by roughly 80%) and
> rebuilding world (which improved stability by another 19% ;) the userland
> seems to be much more stable now! Kernel wise I hit the bug you described
> below at every bootup/shutdown and the first hit of a key on the console,
> but the system keeps running afterwards...
>
> Booting with 2 CPUs is still ending up in
>
> Spanic: blockable sleep lock (sleep mutex) XCONS LOCK @
> dev/xen/console/console.c:290
> cpuid = 1
> KDB: enter: panic
> [thread pid 11 tid 100003 ]
> Stopped at      kdb_enter+0x3a: movl    $0,kdb_why
>
> Anyway, thanks for your effort!
>
> Kai
>
> On 2/3/09 6:36 AM, "Kip Macy" <km...@freebsd.org> wrote:
>
>> Hi Kai,
>>
>> This should be fixed by r188042. Interrupts need to be disabled on
>> entry to the page fault handler or we risk being preempted prior to
>> reading cr2 (the faulting address).
>>
>> There is still another fundamental stability bug whereby timer
>> interrupts appear to sometimes be left disabled until another
>> interrupt (console, network, disk) comes in at which point they're
>> re-enabled. You may or may not hit that, I only have one configuration
>> where I'm able to reproduce that issue.
>>
>> Cheers,
>> Kip
>>
>>
>> On Thu, Jan 29, 2009 at 7:34 AM, Kai Mosebach <x...@komadev.de> wrote:
>>> Hi,
>>>
>>> i recently got my first FreeBSD 8 domU working and i am quite happy to see
>>> that there is eventually progress on the important Xen topic for FreeBSD.
>>> Since this domU as a svn -head checkout from 23.01.09 still segfaults here
>>> and there i startet to rebuild the whole world with debugging symbols in the
>>> hope that the backtraces give more info's on where to find bugs.
>>>
>>> Here are the first results from several core files which hang around in the
>>> system after a world build and i hope the developers here can make more 
>>> sense
>>> out of it than me.
>>>
>>> If you need further dumps/traces or have some advises how to go on from 
>>> here,
>>> please let me know!
>>>
>>> Best Kai
>>>
>>> /usr/obj/usr/src/make.core
>>>
>>> Program terminated with signal 11, Segmentation fault.
>>> #0  0x0804da01 in Cmd_Exec (
>>>   cmd=0x2812df00 "/usr/bin/env -i PATH=/sbin:/bin:/usr/sbin:/usr/bin make
>>> __MAKE_CONF=/etc/make.conf  -f /dev/null -V MAKEOBJDIRPREFIX dummy",
>>>   error=0xbf7fdb18) at /usr/src/usr.bin/make/job.c:2713
>>> 2713            if ((ps.child_pid = vfork()) == -1) {
>>> (gdb) bt
>>> #0  0x0804da01 in Cmd_Exec (
>>>   cmd=0x2812df00 "/usr/bin/env -i PATH=/sbin:/bin:/usr/sbin:/usr/bin make
>>> __MAKE_CONF=/etc/make.conf  -f /dev/null -V MAKEOBJDIRPREFIX dummy",
>>>   error=0xbf7fdb18) at /usr/src/usr.bin/make/job.c:2713
>>> #1  0x080544ed in Parse_DoVar (line=0x28128b00 "_MAKEOBJDIRPREFIX",
>>>   ctxt=0x2810e200) at /usr/src/usr.bin/make/parse.c:1520
>>> #2  0x08055a1a in Parse_File (name=0xbf7fdbf8 "/usr/src/Makefile",
>>>   stream=0x80a4960) at /usr/src/usr.bin/make/parse.c:2457
>>> #3  0x08051e68 in ReadMakefile (p=Variable "p" is not available.
>>> ) at /usr/src/usr.bin/make/main.c:323
>>> #4  0x08051f24 in TryReadMakefile (p=0x8094744 "Makefile")
>>>   at /usr/src/usr.bin/make/main.c:342
>>> #5  0x080527c3 in main (argc=1, argv=0xbf7feddc)
>>>   at /usr/src/usr.bin/make/main.c:1209
>>> (gdb)
>>>
>>>
>>>
>>> /usr/src/sbin/atacontrol/sh.core
>>>
>>> Core was generated by `sh'.
>>> Program terminated with signal 11, Segmentation fault.
>>> Reading symbols from /lib/libedit.so.6...done.
>>> Loaded symbols for /lib/libedit.so.6
>>> Reading symbols from /lib/libncurses.so.7...done.
>>> Loaded symbols for /lib/libncurses.so.7
>>> Reading symbols from /lib/libc.so.7...done.
>>> Loaded symbols for /lib/libc.so.7
>>> Reading symbols from /libexec/ld-elf.so.1...done.
>>> Loaded symbols for /libexec/ld-elf.so.1
>>> #0  0x080555e6 in forkshell (jp=0x2830c0c0, n=0x28304d94, mode=0) at
>>> /usr/src/bin/sh/jobs.c:746
>>> 746             pid = fork();
>>> (gdb) bt
>>> #0  0x080555e6 in forkshell (jp=0x2830c0c0, n=0x28304d94, mode=0) at
>>> /usr/src/bin/sh/jobs.c:746
>>> #1  0x0804d759 in evalcommand (cmd=0x28304d94, flags=0, backcmd=0x0) at
>>> /usr/src/bin/sh/eval.c:747
>>> #2  0x0804e725 in evaltree (n=0x28304d94, flags=0) at
>>> /usr/src/bin/sh/eval.c:267
>>> #3  0x0804e4ff in evaltree (n=0x28304da4, flags=0) at
>>> /usr/src/bin/sh/eval.c:238
>>> #4  0x0804e86c in evaltree (n=0x28304210, flags=0) at
>>> /usr/src/bin/sh/eval.c:341
>>> #5  0x0804eba7 in evalstring (
>>>    s=0xbf7fea84 "for entry in adjkerntz  atacontrol  atm  badsect  bsdlabel
>>> camcontrol  ccdconfig  clri  comcontrol  conscontrol  ddb  devd  devfs
>>> dhclient  dmesg  dump  dumpfs  dumpon  fdisk    ffsinfo  fsck   fsck_"...) 
>>> at
>>> /usr/src/bin/sh/eval.c:169
>>> #6  0x08056d98 in main (argc=3, argv=0xbf7fe9a8) at
>>> /usr/src/bin/sh/main.c:181
>>>
>>>
>>>
>>>
>>> /usr/obj/usr/src/libexec/ftpd/make.core
>>>
>>> Program terminated with signal 11, Segmentation fault.
>>> #0  0x080898bf in memset ()
>>> (gdb) bt
>>> #0  0x080898bf in memset ()
>>> #1  0x0000000c in ?? ()
>>> #2  0x0806f8b2 in arena_malloc ()
>>> #3  0x0807106b in malloc ()
>>> #4  0x0805a2d1 in emalloc (len=256) at /usr/src/usr.bin/make/util.c:234
>>> #5  0x08049d3f in Buf_Init (size=0) at /usr/src/usr.bin/make/buf.c:184
>>> #6  0x0805a63a in VarCreate (name=0x2810d118 ".CURDIR", value=0xbf7fe0b6
>>> "/usr/src/libexec/ftpd", flags=0) at /usr/src/usr.bin/make/var.c:214
>>> #7  0x0805a68d in VarAdd (name=0x2810d118 ".CURDIR", val=0xbf7fe0b6
>>> "/usr/src/libexec/ftpd", ctxt=0x28112180) at /usr/src/usr.bin/make/var.c:954
>>> #8  0x0805d2fc in Var_Set (name=0x809409d ".CURDIR", val=0xbf7fe0b6
>>> "/usr/src/libexec/ftpd", ctxt=0x28112180) at 
>>> /usr/src/usr.bin/make/var.c:1009
>>> #9  0x0805d321 in Var_SetGlobal (name=0x809409d ".CURDIR", value=0xbf7fe0b6
>>> "/usr/src/libexec/ftpd") at /usr/src/usr.bin/make/var.c:1035
>>> #10 0x0805243f in main (argc=3, argv=0xbf7fed74) at
>>> /usr/src/usr.bin/make/main.c:1115
>>>
>>>
>>>
>>> /usr/obj/usr/src/usr.bin/telnet/as.core
>>>
>>> Program terminated with signal 11, Segmentation fault.
>>> #0  0x080480d6 in _start ()
>>> (gdb) bt
>>> #0  0x080480d6 in _start ()
>>> #1  0x00000003 in ?? ()
>>> _______________________________________________
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>
>
>
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