-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, it's me again, I hate when I do that. If I had searched 5 more minutes, I would have found this thread on the ML that talks about VMCOREINFO_XEN and how to read it with 'readelf': http://www.redhat.com/archives/crash-utility/2008-September/msg00006.html Sorry for the noise ;-) Kind Regards, ...Louis Bouchard, Louis a écrit : > Hello and a very happy new year to everyone ! > > I'm still at work on crashdc and making good progress. I have a working > version for the standard i386 kernels of RHEL5, SLES10 and SLES11 working. > > I'm currently working on making sure that all type of kernels delivered > by the distros will work fine with crashdc and I'm hitting a snag with > Xen on RHEL5 (for Dom0). No big deal, but when there is more than 4 Gb > of memory, kdump loads the PAE kernel even if a Xen kernel was > previously running. So I cannot use 'uname' to identify the kernel > context to use the appropriate debuginfo kernel. > > So if I want to be able to choose the adequate vmcore from the debuginfo > package, I must rely on the vmcore file produced to identify which one > (i.e. PAE, XEN or std) to use. > > It looks like the first few bytes of the xen vmcore file might hold the > information I'm looking for. Doing the following 'od' on a vmcore file > created from a Xen kernel gives me this : > > od -N2000 -S3 vmcore.xen | more > 0000544 CORE > 0001010 Xen > 0001050 Xen > 0001140 VMCOREINFO_XEN > > Same on a PAE or standard vmcore brings back this : > od -N2000 -S3 vmcore.pae | more > 0000544 CORE > 0001010 VMCOREINFO > > I might search the web for a description of the vmcore file format, but > I'm sure that many of you here can point me to the right direction and, > maybe, tell me if I'm making the right assumption in thinking that those > values can safely identify a Xen kernel. > > I've looked at xendump.[c|h] from the crash utility sources and it looks > like there is a Xen specific signature but I might be interpreting this > in the wrong way. > > Maybe someone care to comment ? > > TIA and Kind Regards, > - -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility - -- Louis Bouchard, Linux Support Engineer Team lead, EMEA Linux Competency Center, Linux Ambassador, HP HP Services 1 Ave du Canada HP France Z.A. de Courtaboeuf louis.bouchard@xxxxxx 91 947 Les Ulis http://www.hp.com/go/linux France http://www.hp.com/fr -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAktEtd4ACgkQDvqokHrhnCxadgCgpkTtayOH5gU1MXixmPSCTkQ1 /nEAn1rth5ADoXvsGJgMcBOea059T537 =ro4Y -----END PGP SIGNATURE----- -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
