Cced the crash utility maintainer. BZ filed -- https://bugzilla.redhat.com/show_bug.cgi?id=526749 > It does make -d 16 works without errors. However, the crash utility > failed to read it (the log attached), but the full VMCore is working > fine there. > > crash: page excluded: kernel virtual address: ffffffff819f1764 type: > "tss_struct ist array" Thanks! CAI Qian From: "Ken'ichi Ohmichi" <oomichi@xxxxxxxxxxxxxxxxx> Subject: Re: Can't exclude unnecessary pages for 2.6.31 Kernel Date: Fri, 02 Oct 2009 09:16:50 +0900 > > Hi CAI, > > Thank you for testing and your report. > > CAI Qian wrote: >> Met 2 issues with 2.6.31 kernel. >> >> (1) makedumpfile needs to be updated to support 2.6.31 kernel. This looks like >> an easy fix. In makedumpfile.h, >> >> #define LATEST_VERSION (0x0206001d) /* linux-2.6.29 */ > > The next makedumpfile will support 2.6.31 kernel, and the above will be fixed. > > >> (2) makedumpfile -d 16 failed. >> >> # makedumpfile -D -d 16 >> /var/crash/127.0.0.1-2009-10-01-06\:22\:33/vmcore vmcore >> >> LOAD (0) >> phys_start : 1000000 >> phys_end : 2683000 >> virt_start : ffffffff81000000 >> virt_end : ffffffff82683000 >> LOAD (1) >> phys_start : 0 >> phys_end : a0000 >> virt_start : ffff810000000000 >> virt_end : ffff8100000a0000 >> LOAD (2) >> phys_start : 100000 >> phys_end : 3000000 >> virt_start : ffff810000100000 >> virt_end : ffff810003000000 >> LOAD (3) >> phys_start : b000000 >> phys_end : 3ff70000 >> virt_start : ffff81000b000000 >> virt_end : ffff81003ff70000 >> Linux kdump >> page_size : 4096 >> >> max_mapnr : 3ff70 >> The kernel version is not supported. >> The created dumpfile may be incomplete. >> >> num of NODEs : 1 >> >> >> Memory type : SPARSEMEM >> >> mem_map (0) >> mem_map : ffff880002664000 >> pfn_start : 0 >> pfn_end : 8000 >> mem_map (1) >> mem_map : 0 >> pfn_start : 8000 >> pfn_end : 10000 >> mem_map (2) >> mem_map : 0 >> pfn_start : 10000 >> pfn_end : 18000 >> mem_map (3) >> mem_map : 0 >> pfn_start : 18000 >> pfn_end : 20000 >> mem_map (4) >> mem_map : 0 >> pfn_start : 20000 >> pfn_end : 28000 >> mem_map (5) >> mem_map : 0 >> pfn_start : 28000 >> pfn_end : 30000 >> mem_map (6) >> mem_map : 0 >> pfn_start : 30000 >> pfn_end : 38000 >> mem_map (7) >> mem_map : 0 >> pfn_start : 38000 >> pfn_end : 3ff70 >> Excluding unnecessary pages : [100 %] page_to_pfn: Can't convert >> the address of page descriptor (ffffea000004e000) to pfn. >> >> create_2nd_bitmap: Can't exclude unnecessary pages. >> >> makedumpfile Failed. > > The cause is that the virtual memory map of x86_64 has been changed to > the following since linux-2.6.31. > > 15250 --- a/Documentation/x86/x86_64/mm.txt > 15251 +++ b/Documentation/x86/x86_64/mm.txt > 15252 @@ -6,10 +6,11 @@ Virtual memory map with 4 level page tables: > 15253 0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm > 15254 hole caused by [48:63] sign extension > 15255 ffff800000000000 - ffff80ffffffffff (=40 bits) guard hole > 15256 -ffff880000000000 - ffffc0ffffffffff (=57 TB) direct mapping of all phys. memory > 15257 -ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole > 15258 -ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space > 15259 -ffffe20000000000 - ffffe2ffffffffff (=40 bits) virtual memory map (1TB) > 15260 +ffff880000000000 - ffffc7ffffffffff (=64 TB) direct mapping of all phys. memory > 15261 +ffffc80000000000 - ffffc8ffffffffff (=40 bits) hole > 15262 +ffffc90000000000 - ffffe8ffffffffff (=45 bits) vmalloc/ioremap space > 15263 +ffffe90000000000 - ffffe9ffffffffff (=40 bits) hole > 15264 +ffffea0000000000 - ffffeaffffffffff (=40 bits) virtual memory map (1TB) > > I created the patch for catching this change. > Could you try the attached patch ? > > > Thanks > Ken'ichi Ohmichi > > --- > [PATCH] Add x86_64 linux-2.6.31 support. > > Virtual memory map of x86_64 has been changed to the following > since linux-2.6.31. > > 15250 --- a/Documentation/x86/x86_64/mm.txt > 15251 +++ b/Documentation/x86/x86_64/mm.txt > 15252 @@ -6,10 +6,11 @@ Virtual memory map with 4 level page tables: > 15253 0000000000000000 - 00007fffffffffff (=47 bits) user space, different per mm > 15254 hole caused by [48:63] sign extension > 15255 ffff800000000000 - ffff80ffffffffff (=40 bits) guard hole > 15256 -ffff880000000000 - ffffc0ffffffffff (=57 TB) direct mapping of all phys. memory > 15257 -ffffc10000000000 - ffffc1ffffffffff (=40 bits) hole > 15258 -ffffc20000000000 - ffffe1ffffffffff (=45 bits) vmalloc/ioremap space > 15259 -ffffe20000000000 - ffffe2ffffffffff (=40 bits) virtual memory map (1TB) > 15260 +ffff880000000000 - ffffc7ffffffffff (=64 TB) direct mapping of all phys. memory > 15261 +ffffc80000000000 - ffffc8ffffffffff (=40 bits) hole > 15262 +ffffc90000000000 - ffffe8ffffffffff (=45 bits) vmalloc/ioremap space > 15263 +ffffe90000000000 - ffffe9ffffffffff (=40 bits) hole > 15264 +ffffea0000000000 - ffffeaffffffffff (=40 bits) virtual memory map (1TB) > > This patch catches up this change. > > > Signed-off-by: Ken'ichi Ohmichi <oomichi at mxs.nes.nec.co.jp> > --- > diff -rpuN a/makedumpfile.h b/makedumpfile.h > --- a/makedumpfile.h 2009-04-20 15:26:23.000000000 +0900 > +++ b/makedumpfile.h 2009-10-02 09:44:44.000000000 +0900 > @@ -450,6 +450,7 @@ do { \ > #define LATEST_VERSION (0x0206001d) /* linux-2.6.29 */ > #define VERSION_LINUX_2_6_26 (0x0206001a) /* linux-2.6.26 */ > #define VERSION_LINUX_2_6_27 (0x0206001b) /* linux-2.6.27 */ > +#define VERSION_LINUX_2_6_31 (0x0206001f) /* linux-2.6.31 */ > > /* > * vmcoreinfo in /proc/vmcore > @@ -502,6 +503,10 @@ do { \ > * The value of dependence on machine > */ > #define PAGE_OFFSET (info->page_offset) > +#define VMALLOC_START (info->vmalloc_start) > +#define VMALLOC_END (info->vmalloc_end) > +#define VMEMMAP_START (info->vmemmap_start) > +#define VMEMMAP_END (info->vmemmap_end) > > #ifdef __x86__ > #define __PAGE_OFFSET (0xc0000000) > @@ -535,12 +540,18 @@ do { \ > #endif /* x86 */ > > #ifdef __x86_64__ > -#define __PAGE_OFFSET_ORIG (0xffff810000000000) /* linux-2.6.26, or former */ > -#define __PAGE_OFFSET_2_6_27 (0xffff880000000000) /* linux-2.6.27, or later */ > -#define VMALLOC_START (0xffffc20000000000) > -#define VMALLOC_END (0xffffe1ffffffffff) > -#define VMEMMAP_START (0xffffe20000000000) > -#define VMEMMAP_END (0xffffe2ffffffffff) > +#define __PAGE_OFFSET_ORIG (0xffff810000000000) /* 2.6.26, or former */ > +#define __PAGE_OFFSET_2_6_27 (0xffff880000000000) /* 2.6.27, or later */ > + > +#define VMALLOC_START_ORIG (0xffffc20000000000) /* 2.6.30, or former */ > +#define VMALLOC_START_2_6_31 (0xffffc90000000000) /* 2.6.31, or later */ > +#define VMALLOC_END_ORIG (0xffffe1ffffffffff) /* 2.6.30, or former */ > +#define VMALLOC_END_2_6_31 (0xffffe8ffffffffff) /* 2.6.31, or later */ > + > +#define VMEMMAP_START_ORIG (0xffffe20000000000) /* 2.6.30, or former */ > +#define VMEMMAP_START_2_6_31 (0xffffea0000000000) /* 2.6.31, or later */ > +#define VMEMMAP_END_ORIG (0xffffe2ffffffffff) /* 2.6.30, or former */ > +#define VMEMMAP_END_2_6_31 (0xffffeaffffffffff) /* 2.6.31, or later */ > > #define __START_KERNEL_map (0xffffffff80000000) > #define MODULES_VADDR (0xffffffff88000000) > @@ -549,6 +560,7 @@ do { \ > #define _SECTION_SIZE_BITS (27) > #define _MAX_PHYSMEM_BITS_ORIG (40) > #define _MAX_PHYSMEM_BITS_2_6_26 (44) > +#define _MAX_PHYSMEM_BITS_2_6_31 (46) > > /* > * 4 Levels paging > @@ -786,6 +798,9 @@ struct DumpInfo { > unsigned long phys_base; > unsigned long kernel_start; > unsigned long vmalloc_start; > + unsigned long vmalloc_end; > + unsigned long vmemmap_start; > + unsigned long vmemmap_end; > > /* > * diskdimp info: > diff -rpuN a/x86_64.c b/x86_64.c > --- a/x86_64.c 2008-10-10 10:13:19.000000000 +0900 > +++ b/x86_64.c 2009-10-02 09:45:39.000000000 +0900 > @@ -70,14 +70,28 @@ get_versiondep_info_x86_64(void) > */ > if (info->kernel_version < VERSION_LINUX_2_6_26) > info->max_physmem_bits = _MAX_PHYSMEM_BITS_ORIG; > - else > + else if (info->kernel_version < VERSION_LINUX_2_6_31) > info->max_physmem_bits = _MAX_PHYSMEM_BITS_2_6_26; > + else > + info->max_physmem_bits = _MAX_PHYSMEM_BITS_2_6_31; > > if (info->kernel_version < VERSION_LINUX_2_6_27) > info->page_offset = __PAGE_OFFSET_ORIG; > else > info->page_offset = __PAGE_OFFSET_2_6_27; > > + if (info->kernel_version < VERSION_LINUX_2_6_31) { > + info->vmalloc_start = VMALLOC_START_ORIG; > + info->vmalloc_end = VMALLOC_END_ORIG; > + info->vmemmap_start = VMEMMAP_START_ORIG; > + info->vmemmap_end = VMEMMAP_END_ORIG; > + } else { > + info->vmalloc_start = VMALLOC_START_2_6_31; > + info->vmalloc_end = VMALLOC_END_2_6_31; > + info->vmemmap_start = VMEMMAP_START_2_6_31; > + info->vmemmap_end = VMEMMAP_END_2_6_31; > + } > + > return TRUE; > } > >
