Date: Tue, 15 Feb 2011 22:01:01 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: "Dr. Baud" <drbaud@yahoo.com> Cc: freebsd-hackers@freebsd.org Subject: Re: spontaneous reboot - ptrace Message-ID: <20110215200101.GE78089@deviant.kiev.zoral.com.ua> In-Reply-To: <628608.40948.qm@web120708.mail.ne1.yahoo.com> References: <628608.40948.qm@web120708.mail.ne1.yahoo.com>
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--xgtqT0tr7NoD/uy/ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Feb 15, 2011 at 09:46:05AM -0800, Dr. Baud wrote: > I've an interesting anomaly I'd appreciate some help with. >=20 > As a result of looking at a threading problem I modified gcore=20 > to dump all memory segments associated with a process; > basically comment out the "Ignore" conditional in readmap(). > The result is that the box spontaneously reboots sometime > Between 40 and 50 seconds into the dump; this is an application > that is indeed a memory hog. I commented out the actual > write to disk and the result is the same. I???ve even disabled the > watchdog to no avail. >=20 > This is a vanilla 8.1 install: >=20 > FreeBSD pollyanna 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49= UTC=20 > 2010 > root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >=20 > running on fairly vanilla hardware: >=20 > CPU: Intel(R) Xeon(TM) CPU 3.20GHz (3212.93-MHz K8-class CPU) > Origin =3D "GenuineIntel" Id =3D 0xf49 Family =3D f Model =3D 4 Ste= pping =3D 9 > Features=3D0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,= PGE,MCA,C > MOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=3D0x641d<SSE3,DTES64,MON,DS_CPL,CNXT-ID,CX16,xTPR> > AMD Features=3D0x20000800<SYSCALL,LM> > AMD Features2=3D0x1<LAHF> > TSC: P-state invariant >=20 > =20 > Any thoughts on how to proceed? First, do you have a console output during the run ? Is it possible that machine paniced ? If not, were there any kernel messages before reboot ? Second, what is the process you are dumping ? Can you show at least the procstat -v <pid> output for the process ? --xgtqT0tr7NoD/uy/ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk1a230ACgkQC3+MBN1Mb4gz2wCgqCUROYg5ZhMA8uB5Jut9iID6 pvYAoLEusSihA+4MWPgnZdmsEuBHFpRs =0aRP -----END PGP SIGNATURE----- --xgtqT0tr7NoD/uy/--
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