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Re: port-xen/47057: Xen NetBSD DomU file system trash under Linux Dom0
The following reply was made to PR port-xen/47057; it has been noted by GNATS.
From: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau%citrix.com@localhost>
To: "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%NetBSD.org@localhost>
Cc: Manuel Bouyer <bouyer%antioche.eu.org@localhost>,
"port-xen-maintainer%netbsd.org@localhost"
<port-xen-maintainer%netbsd.org@localhost>,
"gnats-admin%netbsd.org@localhost"
<gnats-admin%netbsd.org@localhost>, "netbsd-bugs%netbsd.org@localhost"
<netbsd-bugs%netbsd.org@localhost>,
"royger%netbsd.org@localhost" <royger%netbsd.org@localhost>
Subject: Re: port-xen/47057: Xen NetBSD DomU file system trash under Linux
Dom0
Date: Sat, 20 Oct 2012 13:31:37 +0200
More info on this subject, I was able to get to ddb after the system
freezed (using +++++), here is the output:
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff80130bf5 cs e030 rflags 202 cr2
7f7ff780c390 cpl 8 rsp ffffa0002e4848a8
Stopped in pid 0.26 (system) at netbsd:breakpoint+0x5: leave
breakpoint() at netbsd:breakpoint+0x5
xencons_tty_input() at netbsd:xencons_tty_input+0xc9
xencons_handler() at netbsd:xencons_handler+0x79
intr_biglock_wrapper() at netbsd:intr_biglock_wrapper+0x1d
evtchn_do_event() at netbsd:evtchn_do_event+0x15a
call_evtchn_do_event() at netbsd:call_evtchn_do_event+0xd
hypervisor_callback() at netbsd:hypervisor_callback+0x9e
xenbus_thread() at netbsd:xenbus_thread+0xf5
ds ca00
es 4a58
fs b9e8
gs 6640
rdi 1
rsi ffffffff80a7b303
rbp ffffa0002e4848a8
rbx ffffffff80a7b303
rdx 2b
rcx 2b
rax 7f
r8 ffffffff80a8f800
r9 0
r10 ffffffff80a8fa00
r11 246
r12 ffffa00002365090
r13 ffffffff80a7b303
r14 ffffa00002367340
r15 1
rip ffffffff80130bf5 breakpoint+0x5
cs e030
rflags 202
rsp ffffa0002e4848a8
ss e02b
And the ps:
db{0}> ps
PID LID S CPU FLAGS STRUCT LWP * NAME WAIT
26620 1 2 0 0 ffffa00008045b00 cc1
28013 1 3 0 80 ffffa00002fe61a0 x86_64--netbsd-g wait
23074 1 3 0 80 ffffa000080456e0 nbmkdep wait
16970 1 3 0 80 ffffa00002628180 sh wait
14476 1 2 0 0 ffffa00002b6f600 nbmkdep
24751 1 2 0 0 ffffa0000404a4c0 as
23651 1 3 0 80 ffffa000034d95a0 sh wait
16446 1 2 0 40000 ffffa00002fe65c0 cc1
3398 1 3 0 80 ffffa00002fd95a0 x86_64--netbsd-g wait
22279 1 3 0 80 ffffa0000387a980 sh wait
16566 1 3 0 40080 ffffa000076672c0 nbmake select
22489 1 3 0 40080 ffffa0000236e520 sh wait
16321 1 3 0 80 ffffa00002aa7660 nbmake select
21974 1 3 0 80 ffffa00002573960 sh wait
5656 1 3 0 80 ffffa0000236b8e0 x86_64--netbsd-g wait
6264 1 3 0 80 ffffa000075881e0 sh wait
870 1 3 0 80 ffffa0000404a0a0 nbmake select
28228 1 3 0 80 ffffa00002aa7a80 sh wait
19537 1 3 0 80 ffffa000076676e0 nbmake select
19740 1 3 0 80 ffffa00007588600 sh wait
8737 1 3 0 80 ffffa00002f8e220 nbmake select
29418 1 3 0 80 ffffa00002fa5aa0 sh wait
4427 1 3 0 80 ffffa0000263a5c0 nbmake select
28916 1 3 0 80 ffffa000080452c0 sh wait
13113 1 3 0 80 ffffa00002fe69e0 nbmake select
19412 1 3 0 80 ffffa000075691c0 sh wait
583 1 3 0 80 ffffa0000387a140 nbmake select
5923 1 3 0 80 ffffa000085da860 sh wait
21434 1 3 0 80 ffffa0000404a8e0 nbmake select
22103 1 3 0 80 ffffa00002f8ea60 sh wait
22077 1 3 0 80 ffffa00002b6f1e0 nbmake select
6976 1 3 0 80 ffffa000085da020 sh wait
18463 1 3 0 80 ffffa000075695e0 nbmake select
19784 1 3 0 80 ffffa00002f8e640 sh wait
8975 1 3 0 80 ffffa00007eb0420 nbmake select
6597 1 3 0 80 ffffa000026289c0 sh wait
18499 1 3 0 80 ffffa00002aa7240 nbmake select
649 1 3 0 80 ffffa0000263a1a0 sh wait
23152 1 3 0 80 ffffa0000387a560 nbmake select
11133 1 3 0 80 ffffa00007588a20 sh wait
11482 1 2 0 0 ffffa00007569a00 getty
15288 1 3 0 80 ffffa00007667b00 sh wait
6588 1 3 0 80 ffffa000034d99c0 screen-4.0.3 select
541 1 3 0 80 ffffa000026285a0 getty nanoslp
479 1 3 0 80 ffffa00002573540 getty nanoslp
539 1 3 0 80 ffffa0000236e100 getty nanoslp
532 1 3 0 80 ffffa000025fd580 cron nanoslp
535 1 3 0 80 ffffa0000263a9e0 inetd kqueue
333 1 3 0 80 ffffa000025fd9a0 sshd select
463 1 3 0 80 ffffa00002590980 powerd kqueue
307 1 2 0 0 ffffa000025fd160 syslogd
249 1 3 0 80 ffffa00002590560 dhcpcd select
1 1 3 0 80 ffffa0000236c0c0 init wait
0 36 3 0 200 ffffa00002590140 physiod physiod
0 35 3 0 200 ffffa0000236b4c0 aiodoned aiodoned
0 34 3 0 200 ffffa0000236c900 ioflush syncer
0 33 3 0 200 ffffa0000236b0a0 pgdaemon pgdaemon
0 30 3 0 200 ffffa0000235e080 cryptoret crypto_w
0 29 3 0 200 ffffa0000236c4e0 xen_balloon xen_balloon
0 28 3 0 200 ffffa0000236d920 unpgc unpgc
0 27 3 0 200 ffffa0000236d500 vmem_rehash vmem_rehash
0 > 26 7 0 200 ffffa0000236e940 xenbus
0 25 3 0 200 ffffa0000236d0e0 xenwatch evtsq
0 15 3 0 200 ffffa0000235e4a0 pmfsuspend pmfsuspend
0 14 3 0 200 ffffa0000235e8c0 pmfevent pmfevent
0 13 3 0 200 ffffa00001ee4060 sopendfree sopendfr
0 12 3 0 200 ffffa00001ee4480 nfssilly nfssilly
0 11 3 0 200 ffffa00001ee48a0 cachegc cachegc
0 10 3 0 200 ffffa00001ee3040 vrele vrele
0 9 3 0 200 ffffa00001ee3460 vdrain vdrain
0 8 3 0 200 ffffa00001ee3880 modunload mod_unld
0 7 3 0 200 ffffa00001ed9020 xcall/0 xcall
0 6 1 0 200 ffffa00001ed9440 softser/0
0 5 1 0 200 ffffa00001ed9860 softclk/0
0 4 1 0 200 ffffa00001ed6000 softbio/0
0 3 1 0 200 ffffa00001ed6420 softnet/0
0 2 1 0 201 ffffa00001ed6840 idle/0
0 1 3 0 200 ffffffff805b4c80 swapper uvm
I will try to create a patch that shows the value of the ring indexes,
since I'm pretty sure they are screwed up, and the system was blocked in
xenbus_thread because of that before the callback came in.
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