On Fri, Nov 22, 2013 at 06:01:55PM +0530, Hari Bathini wrote: > Makedumpfile fails to filter dump for kernels build with CONFIG_SPARSEMEM_VMEMMAP > enabled as it fails to do vmemmap translations. So far, makedumpfile on ppc64 never > had to deal with vmemmap addresses (vmemmap regions) seperately to filter ppc64 > crash dumps as vmemmap regions where mapped in zone normal. But with the inclusion > of CONFIG_SPARSEMEM_VMEMMAP config option in recent kernels, vmemmap memory regions > are mapped outside zone normal. There is a need to handle vmemmap to physical address > translation seperately in this scenario. This patch provides support in makedumpfile > tool to do vmemmap to physical address translation when vmemmap regions are mapped > outside zone normal. Some kernel symbols are needed in vmcoreinfo for this changes to > be effective. The kernel patch that adds the necessary symbols to vmcoreinfo has been > posted to linuxppc devel mailing list. This patch is influenced by vmemmap to physical > address translation support code in crash utility. It is has been tested successfully > at all dump filtering levels on kernel dumps that have CONFIG_SPARSEMEM_VMEMMAP enabled > and kernel dumps with CONFIG_SPARSEMEM_VMEMMAP disabled as well. Also, successfully > tested dump filtering on already filtered vmcores (re-filtering). Please column width smaller (say 70) for changelogs. This looks messy. Thanks Vivek
