Hi, It looks that Xen support for crash have not been maintained since 2009. I am trying to fix this. Here it is bundle of fixes: - xen: Always calculate max_cpus value, - xen: Read only crash notes for onlined CPUs, - x86/xen: Read variables from dynamically allocated per_cpu data, - xen: Get idle data from alternative source, - xen: Read data correctly from dynamically allocated console ring, too (fixed in this release), - xen: Add support for 3 level P2M tree (new patch in this release). Daniel

On Fri, Aug 10, 2012 at 03:11:57PM -0400, Dave Anderson wrote: > > > ----- Original Message ----- > > Hi, > > > > It looks that Xen support for crash have not been maintained > > since 2009. I am trying to fix this. Here it is bundle of fixes: > > - xen: Always calculate max_cpus value, > > - xen: Read only crash notes for onlined CPUs, > > - x86/xen: Read variables from dynamically allocated per_cpu > > data, > > - xen: Get idle data from alternative source, > > - xen: Read data correctly from dynamically allocated console > > ring, too > > (fixed in this release), > > - xen: Add support for 3 level P2M tree (new patch in this > > release). > > > > Daniel > > Hi Daniel, > > The original 5 updates specific to the Xen hypervisor look OK, > but new patch 6/6 is going to take some studying/testing to > alleviate my backwards-compatibility worries. Can I ask whether > you fully tested it with older 2-level P2M tree kernels? As you asked me earlier I have tested all patches on Xen 3.1 and 4.1, Linux Kernel Ver. 2.6.18 (P2M array), 2.6.36 (2 level P2M tree) and 2.6.39 (3 level P2M tree). Additionaly, there were some internal tests done by others in my company. Daniel

On Mon, Aug 13, 2012 at 03:16:53PM -0400, Dave Anderson wrote: [...] > OK good. It tests OK on a few older pvops kernels that I have on > hand. > > The only thing I've changed is to handle compiler warnings in x86_64.c and > x86.c by initializing p2m_top to NULL in x86_64_pvops_xendump_p2m_l3_create() > and x86_pvops_xendump_p2m_l3_create(). I also used GETBUF() in those two > functions to avoid having to add the malloc-failure line. No problem. However, I am a bit surprised that you have seen some warnings. I have not seen any. Did you compiled crash with extra options or something like that? Or maybe there is a diffrence in our compilers (mine is gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) - quite ancient).