Date: Sat, 3 Mar 2001 20:42:01 -0400 (AST) From: The Hermit Hacker <scrappy@hub.org> To: <freebsd-current@freebsd.org> Subject: Using serial console to debug system hangs ... Message-ID: <Pine.BSF.4.33.0103032033340.33622-100000@mobile.hub.org>
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Well, after some hurdles with getting the serial console to work, I've now
go it to work ... I put the two sysctl commands into a file so that I
could run it as a script:
#!/bin/sh
sysctl -w debug.ktr.mask=0x1208
sysctl -w debug.ktr.verbose=2
When I 'try' to run it, I get all the 'KTR'(?) messages on my serial
console, something is changing/happening so fast that my ssh connection
into the machine hangs before I finish typing in the shell script:
========
enable_kernel_debug: 3 lines, 72 characters.
thelab# !./
========
needless to say, running the command to hang the computer is proving
difficult :)
Then again, if I do a cold boot of the machine, the messages stop
scrolling up the console, but a cut-n-paste of them is sort of illegible:
========
k0clo.c/k...c/.k4e3r8n /RkEeLr n(_scplionc)k .scch2e0d9 lRoEcLk (s[p0xicn0) 32c1al1l8o0]ut r[=00x ca0t 31.d./8.2.0/] ker=r0n/ akte r.n._c/l.o./ckk.ecrn:4/k3e8r
e_cpluo1c k..c/:.2.0/9k
rcnp/uk0e r.n./.l.o/ckke.rcn./3k5e0r nG_OcTl o(cskp.icn.)2 0s3c hGeOdT l(oscpki n[)0 xccall2o1u1t8 0[]0 xrc=003 1adt8 2.0.]/ ..0/k aertn ./.k/er..n_/ckllorcnk/.kecr:n35_0c
.ok.uc1: 2.0.3/
.c/pkue0r.n/.k/.er./n_kcelrnoc/kke.crn.4_c38l ocRkEL. c(.s2p09in )R ELs ch(sepd iln)oc kc al[0loxuct03 [210x18c003] 1rd=802 0a] t r=..0/ a..t /.k.er/.n./.ckerenrn_c/lkoerckn_.ccl:4oc3k8
:20u91
.c.p/u.0. /.k.e/r.n.//kkeerrnn_/ckleorcnk_.ccl.o3c5k0. cG.O2T0 3( sGpOiTn )( sspcihne)d claolclko u[t0 x[c00x3213118d08]2 0r]= 0r =a0t a.t. /....//.k.e/0ke/rkne/rkne_rcnl_occlko.cck:.3c5:02
p3c
uc1p u.0. /....//.k.e/rkne/rkne/rkne_rcnl_occlko.cck..4c3.82 RE LR E(Ls p(isnp)i ns)c hceadl lloouctk [[00xxcc003312d1812800]] rr==00 aatt ....//....//kkeerrnn//kkeerrnn__cclloocckk..cc::24398
ccppuu01 ....//....//kkeerrnn//kkeerrnn__cclloocckk..cc..230530 GGOOTT ((ssppiinn)) csaclhleodu tl o[c0kx c[003x1cd0832201]1 8r0=]0 ra=t0 .a.t
========
then again, looking at it, it looks like everything is going in duplicates?
suggestions?
Marc G. Fournier ICQ#7615664 IRC Nick: Scrappy
Systems Administrator @ hub.org
primary: scrappy@hub.org secondary: scrappy@{freebsd|postgresql}.org
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