Hi all, There is a bug when using crash to process the xen domU dump core that larger that 4GB(it is found at processing a 10GB guest core dump file). crash reporting this errors: crash: cannot find mfn 8392757 (0x801035) in page index crash: cannot read/find cr3 page this is caused by a var overflow,in the structure of typedef struct xc_core_header { unsigned int xch_magic; unsigned int xch_nr_vcpus; unsigned int xch_nr_pages; unsigned int xch_ctxt_offset; unsigned int xch_index_offset; unsigned int xch_pages_offset; } xc_core_header_t; the xch_ctxt_offset,xch_index_offset and xch_pages_offset mean the offsets in the core dump file , when it is defined as unsingend long ,that means the file can't be more that 4GB,so when processing with core dump files that more than 4GB may have error (I encountered overflow on that 10GB file),so changing those offset vars to unsigned long ,make sure crash can seek to the right position. btw,please reply directly to me ,I am not in the mail list. Signed-off-by: Xiaowei Hu <xiaowei.hu(a)oracle.com&gt; diff -up crash-5.0.0/xendump.h.org crash-5.0.0/xendump.h --- crash-5.0.0/xendump.h.org 2010-02-04 03:48:04.000000000 +0800 +++ crash-5.0.0/xendump.h 2010-02-04 05:41:27.000000000 +0800 @@ -28,9 +28,9 @@ typedef struct xc_core_header { unsigned int xch_magic; unsigned int xch_nr_vcpus; unsigned int xch_nr_pages; - unsigned int xch_ctxt_offset; - unsigned int xch_index_offset; - unsigned int xch_pages_offset; + unsigned long xch_ctxt_offset; + unsigned long xch_index_offset; + unsigned long xch_pages_offset; } xc_core_header_t; struct pfn_offset_cache {