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Re: amd64 panics w/XEN_DOM0, not GENERIC



 > OK. I guess it's calling physio_biodone() though stdone() (the stack
 > frames got optimized, so stdone() doesn't show up in the stack
 > trace).  Can you run a kernel with the attached patch (either GENERIC
 > of XEN3_DOM0) ? It should give more details about what's going on.

With the GENERIC (+DEBUG+DIAGNOSTIC) kernel, I got:

stdone error 5 count 32768 resid 0
panic: kernel diagnostic assertion "bp->b_error == 0" failed: file 
"/amd/guinness/usr/src/os/NetBSD/src/sys/kern/kern_physio.c", line 219
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff80523155 cs 8 rflags 246 cr2  7f7ffbb52000 cpl 6 
rsp ffff80004ceada60
Stopped in pid 0.18 (system) at netbsd:breakpoint+0x5:  leave

more bits below.

-Todd

---<snip>---
db{0}> trace
breakpoint() at netbsd:breakpoint+0x5
panic() at netbsd:panic+0x260
__kernassert() at netbsd:__kernassert+0x2d
physio_biodone() at netbsd:physio_biodone+0xa7
biodone2() at netbsd:biodone2+0x95
scsipi_complete() at netbsd:scsipi_complete+0x18a
scsipi_completion_thread() at netbsd:scsipi_completion_thread+0xba
db{0}> ps/l
 PID         LID S     FLAGS       STRUCT LWP *               NAME WAIT
 1463          1 3        84   ffff80004f2cc000               sshd select
 2422          1 3        84   ffff80004d955be0               sshd netio
 3740          1 3        80   ffff80004f4cebc0               gzip piperd
 4108          1 3        84   ffff80004f2cc3e0            chunker netio
 1288          1 3        80   ffff80004f141020             pickup kqueue
 868           1 3        80   ffff80004f4dc420             dumper netio
 888           1 3        80   ffff80004f4dc800             dumper netio
 1866          1 3        80   ffff80004f4dcbe0             dumper netio
 1685          1 3        84   ffff80004f4ce020             dumper select
 1171        141 3         4   ffff80004f2ccba0              taper physio
             140 3        84   ffff80004d923bc0              taper parked
               1 3        80   ffff80004f4ce400              taper parked
 843           1 3        80   ffff80004f4ce7e0             driver select
 1642          1 3        80   ffff80004f265040               perl wait
 1186          1 3        80   ffff80004f2cc7c0                ksh pause
 608           1 3        80   ffff80004f265420                 sh wait
 1133          1 3        80   ffff80004d955420               cron piperd
 947           1 3        80   ffff80004ee327c0               bash ttyraw
 1020          1 3        80   ffff80004f02d040               sshd select
 404           1 3        80   ffff80004f265800               sshd netio
 1141          1 3        80   ffff80004f1417e0              getty ttyraw
 366           1 3        80   ffff80004f265be0               qmgr kqueue
 447           1 3        80   ffff80004f141400              getty ttyraw
 515           2 3        80   ffff80004cff1000            apcupsd socket
               1 3        80   ffff80004f141bc0            apcupsd select
 461           1 3        84   ffff80004f09c000               cron nanoslp
 519           1 3        80   ffff80004f09c7c0              inetd kqueue
 486           1 3        80   ffff80004f09c3e0             master kqueue
 285           1 3        80   ffff80004f0287e0             smartd nanoslp
 296           1 3        84   ffff80004f09cba0              snmpd select
 297           1 3        84   ffff80004f02d420               sshd select
 279           1 3        84   ffff80004f02d800               ntpd pause
 216           5 3        84   ffff80004f02dbe0              slave nfsd
               4 3        84   ffff80004f028020              slave nfsd
               3 3        84   ffff80004f028400              slave nfsd
               2 3  10000084   ffff80004f028bc0              slave nfsd
               1 3        80   ffff80004d9237e0             master select
 210           1 3        84   ffff80004ee32000             mountd select
 180           1 3        80   ffff80004ee323e0          mount_mfs mfsidl
 153           1 3        84   ffff80004ee32ba0            rpcbind select
 132           1 2         4   ffff80004d923400            syslogd
 1             1 3        84   ffff80004b09f3e0               init wait
>0            49 5       204   ffff80004d955800           (zombie)
              48 3       204   ffff80004d923020            physiod physiod
              47 3       204   ffff80004cff13e0        vmem_rehash vmem_rehash
              46 3       204   ffff80004cff17c0           aiodoned aiodoned
              45 3       204   ffff80004cff1ba0            ioflush syncer
              44 3       204   ffff80004cfed040           pgdaemon pgdaemon
              43 3       204   ffff80004cfed420            raidio1 raidiow
              42 3       204   ffff80004cfed800              raid1 rfwcond
              41 3       204   ffff80004cfedbe0            raidio0 raidiow
              40 3       204   ffff80004cfe0020              raid0 rfwcond
              39 3       204   ffff80004b09fba0          cryptoret crypto_wait
              38 3       204   ffff80004b09e420               usb4 usbevt
              37 3       204   ffff80004b09e040               usb2 usbevt
              36 3       204   ffff80004b09e800               usb3 usbevt
              35 3       204   ffff80004b09ebe0               usb1 usbevt
              34 3       204   ffff80004cfe0400         usbtask-dr usbtsk
              33 3       204   ffff80004b09f7c0         usbtask-hc usbtsk
              32 3       204   ffff80004b09f000               usb0 usbevt
              31 3       204   ffff80004cfe07e0          coretemp1 coretemp1
              30 3       204   ffff80004cfe0bc0          coretemp0 coretemp0
              21 3       204   ffff80004b09c020               iic0 iicintr
              20 3       204   ffff80004b09c400            atabus1 atath
              19 3       204   ffff80004b09c7e0            atabus0 atath
           >  18 7       204   ffff80004b09cbc0           scsibus0
              17 3       204   ffff80004b099000            xcall/1 xcall
              16 1       204   ffff80004b0993e0          softser/1
              15 1       204   ffff80004b0997c0          softclk/1
              14 1       204   ffff80004b099ba0          softbio/1
              13 1       204   ffff80004b093040          softnet/1
              12 7       205   ffff80004b093420             idle/1
              11 3       204   ffff80004b093800             sysmon smtaskq
              10 3       204   ffff80004b093be0           pmfevent pmfevent
               9 3       204   ffff80004b08c020            cachegc cachegc
               8 3       204   ffff80004b08c400              vrele vrele
               7 3       204   ffff80004b08c7e0            xcall/0 xcall
               6 1       204   ffff80004b08cbc0          softser/0
               5 1       204   ffff80004b08a000          softclk/0
               4 1       204   ffff80004b08a3e0          softbio/0
               3 1       204   ffff80004b08a7c0          softnet/0
               2 1       205   ffff80004b08aba0             idle/0
               1 3       204   ffffffff80bccd60            swapper schedule
db{0}>  ps/a
 PID          COMMAND      STRUCT PROC *            UAREA *     VMSPACE/VM_MAP
 1463            sshd   ffff80004f1df008   ffff80004ecf6d80   ffff80004cfe95c0
 2422            sshd   ffff80004d957d50   ffff80004d98bd80   ffff80004cfe9cf0
 3740            gzip   ffff80004cfe47f8   ffff80004d982d80   ffff80004d9aba18
 4108         chunker   ffff80004cfe4000   ffff80004f36ed80   ffff80004f358d10
 1288          pickup   ffff80004f345ab0   ffff80004f1e9d80   ffff80004d9ab738
 868           dumper   ffff80004f4ddaa0   ffff80004f50ed80   ffff80004f3585e0
 888           dumper   ffff80004f4ddd48   ffff80004f50bd80   ffff80004f358e80
 1866          dumper   ffff80004f345010   ffff80004f508d80   ffff80004f2c9018
 1685          dumper   ffff80004f3452b8   ffff80004f505d80   ffff80004f3588c0
 1171           taper   ffff80004f345560   ffff80004f58dd80   ffff80004f2c9188
 843           driver   ffff80004f345808   ffff80004f4fad80   ffff80004f2c92f8
 1642            perl   ffff80004f1df2b0   ffff80004f292d80   ffff80004f2c9748
 1186             ksh   ffff80004f345d58   ffff80004f30dd80   ffff80004f358020
 608               sh   ffff80004f1df558   ffff80004f25bd80   ffff80004f358190
 1133            cron   ffff80004ef9d2b8   ffff80004d97bd80   ffff80004f358a30
 947             bash   ffff80004d9572b0   ffff80004ee62d80   ffff80004f358750
 1020            sshd   ffff80004cfe4aa0   ffff80004f067d80   ffff80004f11c180
 404             sshd   ffff80004f1df800   ffff80004f24fd80   ffff80004f358300
 1141           getty   ffff80004f09e2a8   ffff80004f1e2d80   ffff80004f11c8b0
 366             qmgr   ffff80004f1dfaa8   ffff80004f24ad80   ffff80004f11c460
 447            getty   ffff80004f09e000   ffff80004f22ad80   ffff80004f11c740
 515          apcupsd   ffff80004f09e550   ffff80004d8b5d80   ffff80004d9ab2e8
 461             cron   ffff80004f09e7f8   ffff80004f0ecd80   ffff80004f11ce70
 519            inetd   ffff80004f09ed48   ffff80004f0e2d80   ffff80004d9ab5c8
 486           master   ffff80004f09eaa0   ffff80004f136d80   ffff80004d9ab008
 285           smartd   ffff80004ef9d808   ffff80004f00fd80   ffff80004cfe98a0
 296            snmpd   ffff80004ef9d010   ffff80004f06bd80   ffff80004d9ab178
 297             sshd   ffff80004ef9d560   ffff80004f063d80   ffff80004d9ab458
 279             ntpd   ffff80004ef9dab0   ffff80004f05cd80   ffff80004d9ab8a8
 216             nfsd   ffff80004cfe4550   ffff80004f059d80   ffff80004d9abe68
 210           mountd   ffff80004ef9dd58   ffff80004f007d80   ffff80004d9abb88
 180        mount_mfs   ffff80004d957008   ffff80004ef78d80   ffff80004d9abcf8
 153          rpcbind   ffff80004d957558   ffff80004ee09d80   ffff80004cfe9450
 132          syslogd   ffff80004cfe42a8   ffff80004d8bed80   ffff80004cfe9a10
 1               init   ffff80004cfe4d48   ffff80004cfced80   ffff80004cfe9e60
>0             system   ffffffff80bccaa0   ffff80004d978d80   ffffffff80c9fb20
P



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