[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] crash can't analyze memory dumpfile of Xen
Hi, Maybe a structure expected by the crash command was lost from xen-3.3.0. and the crash command should be fixed for xen-3.3.0. What arch did you use ? If you send me xen-syms-3.3-unstable and dumpfile.core I will investigate more. Thanks Itusro Oda Yuji Shimada said: > I used the following tools to debug Xen. > > xen-3.3-unstable(changeset 17917) > kexec-tools 2.0.0 > makedumpfile-1.2.8 > crash 4.0-6.3 > > Extraction of the memory dumpfile was completed normally. > And I executed the following command to analyze memory dumpfile of Xen. > > # crash /boot/xen-syms-3.3-unstable dumpfile.core > > The following errors occurred. > > ------------------------------------------- > crash: invalid kernel virtual address:0 > type:"note_buf_t or crash_note_t" > WARNING: cannot fill note core. > > crash: cannot read elf note core. > ------------------------------------------- > > I would like to ask some comments why these errors occurred. > > I did the following steps: > > 1.Boot Xen with the following Dom0 option. > "crashkernel=128M@64M" > And 2nd kernel is loaded by kexec. > > 2.On Dom0 Linux, carry out crash dump. > # echo c > /sys/sysrq-trigger > > 3.On 2nd kernel, extract memory dumpfile. > # makedumpfile -E -X /proc/vmcore dumpfile.core > > 4.Reboot Xen and execute the following command. > And the above errors occurred. > # crash /boot/xen-syms-3.3-unstable dumpfile.core > > I can read the same memory dumpfile by crash command with no error to > debug vmlinux. > > Thanks, > > -- > Yuji Shimada > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > -- Itsuro ODA <oda@xxxxxxxxxxxxx> _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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