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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[-- Attachment #1 --] On Tue, Feb 15, 2011 at 09:46:05AM -0800, Dr. Baud wrote: > I've an interesting anomaly I'd appreciate some help with. > > As a result of looking at a threading problem I modified gcore > 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. > > This is a vanilla 8.1 install: > > FreeBSD pollyanna 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC > 2010 > root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 > > running on fairly vanilla hardware: > > CPU: Intel(R) Xeon(TM) CPU 3.20GHz (3212.93-MHz K8-class CPU) > Origin = "GenuineIntel" Id = 0xf49 Family = f Model = 4 Stepping = 9 > Features=0xbfebfbff<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=0x641d<SSE3,DTES64,MON,DS_CPL,CNXT-ID,CX16,xTPR> > AMD Features=0x20000800<SYSCALL,LM> > AMD Features2=0x1<LAHF> > TSC: P-state invariant > > > 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 ? [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk1a230ACgkQC3+MBN1Mb4gz2wCgqCUROYg5ZhMA8uB5Jut9iID6 pvYAoLEusSihA+4MWPgnZdmsEuBHFpRs =0aRP -----END PGP SIGNATURE-----
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