Re: panic at serial boot

[mh]

Am 2013-03-27 14:32, schrieb Konstantin Belousov:
On Wed, Mar 27, 2013 at 01:56:29PM +0100, m...@kernel32.de wrote:
Am 2013-03-27 06:54, schrieb Andriy Gapon:
> on 27/03/2013 00:00 m...@kernel32.de said the following:
>> Hi Ho,
>>
>> I'm trying to install FreeBSD 10.0-CURRENT snapshot from 
23.03.2013
>> on a Dell
>> M620 blade.
>> However, I'm getting a panic and drop to db while booting.
>>
>> Looks like that:
>>
>> Root mount waiting for: usbus1 usbus0
>> ugen0.2: <vendor 0x8087> at usbus0
>> uhub2: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, 
addr
>> 2> on usbus0
>> ugen1.2: <vendor 0x8087> at usbus1
>> uhub3: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, 
addr
>> 2> on usbus1
>> Root mount waiting for: usbus1 usbus0
>> uhub2: 6 ports with 6 removable, self powered
>> uhub3: 8 ports with 8 removable, self powered
>> ugen0.3: <no manufacturer> at usbus0
>> uhub4: <no manufacturer Gadget USB HUB, class 9/0, rev 2.00/0.00,
>> addr 3> on usbus0
>> Root mount waiting for: usbus1 usbus0
>> ugen1.3: <Avocent> at usbus1
>> ukbd0: <EP1 Interrupt> on usbus1
>> kbd0 at ukbd0
>> kbd0: ukbd0, generic (0), config:0x0, flags:0x3d0000
>> uhub4: 6 ports with 6 removable, self powered
>> Root mount waiting for: usbus0
>> ugen0.4: <Avocent> at usbus0
>> ukbd1: <Keyboard> on usbus0
>> kbd2 at ukbd1
>> kbd2: ukbd1, generic (0), config:0x0, flags:0x3d0000
>> Trying to mount root from ufs:/dev/md0 []...
>> start_init: trying /sbin/init
>> panic: vm_fault: fault on nofault entry, addr: ffffff80002be000
>> cpuid = 15
>> KDB: enter: panic
>> [ thread pid 4 tid 100101 ]
>> Stopped at      kdb_enter+0x3e: movq    $0,kdb_why
>> db>
>>
>> Any idea where to go from here?
>>
>> initially I tried 9.1-STABLE snapshot from the same date, but 
that
>> one doesn't
>> even give serial output while booting. odd thing, but that's 
another
>> story.
>>
>> I just thought since I'm giving -current on this hardware a short
>> and there is a
>> problem, it might be worth reporting.
>> Anything I should do?
>
> 'bt' command at the 'db>' prompt
Here we go:

db> bt
Tracing pid 5 tid 100109 td 0xfffffe00466bf920
kdb_enter() at kdb_enter+0x3e/frame 0xffffff8688d3e340
vpanic() at vpanic+0x147/frame 0xffffff8688d3e380
panic() at panic+0x43/frame 0xffffff8688d3e3e0
vm_fault_hold() at vm_fault_hold+0x14ac/frame 0xffffff8688d3e630
vm_fault() at vm_fault+0x77/frame 0xffffff8688d3e670
trap_pfault() at trap_pfault+0x207/frame 0xffffff8688d3e720
trap() at trap+0x659/frame 0xffffff8688d3e930
calltrap() at calltrap+0x8/frame 0xffffff8688d3e930
--- trap 0xc, rip = 0xffffffff80c1a396, rsp = 0xffffff8688d3e9f0, 
rbp =
0xffffff8688d3ea20 ---
bcopy() at bcopy+0x16/frame 0xffffff8688d3ea20
md_kthread() at md_kthread+0x17d/frame 0xffffff8688d3ea70
fork_exit() at fork_exit+0x84/frame 0xffffff8688d3eab0
fork_trampoline() at fork_trampoline+0xe/frame 0xffffff8688d3eab0
--- trap 0, rip = 0, rsp = 0xffffff8688d3eb70, rbp = 0 ---
db>

where to go from now? :)

Do you use preload md(4) ? If yes, try the following patch:


Yip. I do. Well, mfsbsd does. I just downloaded the snapshot and gave 
it to mfsbsd to build me an iso image. Transformed that into a pxe 
bootable hd image.
I'm going to checkout -CURRENT sources, apply your patch and let mfsbsd 
build a new image.

Not sure whether time permits that today, but I'm starting right away.

Thanks so far. I will report back :)

./Marian

diff --git a/sys/dev/md/md.c b/sys/dev/md/md.c
index d32ddb3..e871d8f 100644
--- a/sys/dev/md/md.c
+++ b/sys/dev/md/md.c
@@ -1008,7 +1008,15 @@ mdinit(struct md_s *sc)
        pp = g_new_providerf(gp, "md%d", sc->unit);
        pp->mediasize = sc->mediasize;
        pp->sectorsize = sc->sectorsize;
-       pp->flags |= G_PF_ACCEPT_UNMAPPED;
+       switch (sc->type) {
+       case MD_MALLOC:
+       case MD_VNODE:
+       case MD_SWAP:
+               pp->flags |= G_PF_ACCEPT_UNMAPPED;
+               break;
+       case MD_PRELOAD:
+               break;
+       }
        sc->gp = gp;
        sc->pp = pp;
        g_error_provider(pp, 0);
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