On 12/22/17 at 12:54pm, Dave Young wrote: > Hi Atsushi, > On 12/21/17 at 08:48am, Atsushi Kumagai wrote: > > Hello Dave, > > > > >[dyoung at dhcp-*-* makedumpfile]$ sudo ./makedumpfile -l -d 31 /mnt/vmcore/vmcore /tmp/vmcore.1 > > >The kernel version is not supported. > > >The makedumpfile operation may be incomplete. > > >Checking for memory holes : [100.0 %] | __vtop4_x86_64: Can't get a valid pte. > > >readmem: Can't convert a virtual address(ffff88007ebb1000) to physical address. > > >readmem: type_addr: 0, addr:ffff88007ebb1000, size:32768 > > >__exclude_unnecessary_pages: Can't read the buffer of struct page. > > >create_2nd_bitmap: Can't exclude unnecessary pages. > > > > > >makedumpfile Failed. > > > > > >If you need the vmcore for debugging please let me know, my test is just > > >a normal test in kvm guest. > > > > Thanks for your report. > > I can't reproduce that in my environment, could you give me the vmcore ? > > It's helpful if you append the vmlinux and the .config. > > I'm bisecting it, nearly finished, will post the results and share > vmcore if needed soon. vmcore/vmlinux (gzipped) and .config: http://people.redhat.com/ruyang/rhbz1528542/ Bisect result is below: 83e3c48729d9ebb7af5a31a504f3fd6aff0348c4 is the first bad commit commit 83e3c48729d9ebb7af5a31a504f3fd6aff0348c4 Author: Kirill A. Shutemov <kirill.shutemov at linux.intel.com> Date: Fri Sep 29 17:08:16 2017 +0300 mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y Size of the mem_section[] array depends on the size of the physical address space. In preparation for boot-time switching between paging modes on x86-64 we need to make the allocation of mem_section[] dynamic, because otherwise we waste a lot of RAM: with CONFIG_NODE_SHIFT=10, mem_section[] size is 32kB for 4-level paging and 2MB for 5-level paging mode. The patch allocates the array on the first call to sparse_memory_present_with_active_regions(). Signed-off-by: Kirill A. Shutemov <kirill.shutemov at linux.intel.com> Cc: Andrew Morton <akpm at linux-foundation.org> Cc: Andy Lutomirski <luto at amacapital.net> Cc: Borislav Petkov <bp at suse.de> Cc: Cyrill Gorcunov <gorcunov at openvz.org> Cc: Linus Torvalds <torvalds at linux-foundation.org> Cc: Peter Zijlstra <peterz at infradead.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: linux-mm at kvack.org Link: http://lkml.kernel.org/r/20170929140821.37654-2-kirill.shutemov at linux.intel.com Signed-off-by: Ingo Molnar <mingo at kernel.org> :040000 040000 68b7ff3eedc2c9ff56e31108f7e982eacbb233fc 0014ee63bebe14efb0e36e0028e2cbe718fd6c30 M include :040000 040000 78adbc296527c802400b1f68e0fbd716920726fa a4eea8117cb318527c0d5a6281d68f312f644831 M mm > > > > > Thanks, > > Atsushi Kumagai > > > > >> >>Signed-off-by: Jeff Mahoney <jeffm at suse.com> > > >> >>--- > > >> >> arch/x86_64.c | 24 +++++++++++++++++++++--- > > >> >> makedumpfile.c | 6 ++++++ > > >> >> makedumpfile.h | 2 ++ > > >> >> 3 files changed, 29 insertions(+), 3 deletions(-) > > >> >> > > >> >>diff --git a/arch/x86_64.c b/arch/x86_64.c > > >> >>index 08dd6b2..9b09035 100644 > > >> >>--- a/arch/x86_64.c > > >> >>+++ b/arch/x86_64.c > > >> >>@@ -259,16 +259,26 @@ vtop4_x86_64(unsigned long vaddr) > > >> >> { > > >> >> unsigned long page_dir, pml4, pgd_paddr, pgd_pte, pmd_paddr, pmd_pte; > > >> >> unsigned long pte_paddr, pte; > > >> >>+ unsigned long init_level4_pgt; > > >> >> > > >> >>- if (SYMBOL(init_level4_pgt) == NOT_FOUND_SYMBOL) { > > >> >>+ if (SYMBOL(init_level4_pgt) != NOT_FOUND_SYMBOL) > > >> >>+ init_level4_pgt = SYMBOL(init_level4_pgt); > > >> >>+ else if (SYMBOL(init_top_pgt) != NOT_FOUND_SYMBOL) > > >> >>+ init_level4_pgt = SYMBOL(init_top_pgt); > > >> >>+ else { > > >> >> ERRMSG("Can't get the symbol of init_level4_pgt.\n"); > > >> >> return NOT_PADDR; > > >> >> } > > >> >> > > >> >>+ if (SYMBOL(level4_kernel_pgt) != NOT_FOUND_SYMBOL) { > > >> >>+ ERRMSG("Kernel is built with 5-level page tables\n"); > > >> >>+ return NOT_PADDR; > > >> >>+ } > > >> >>+ > > >> >> /* > > >> >> * Get PGD. > > >> >> */ > > >> >>- page_dir = SYMBOL(init_level4_pgt) - __START_KERNEL_map + info->phys_base; > > >> >>+ page_dir = init_level4_pgt - __START_KERNEL_map + info->phys_base; > > >> >> if (is_xen_memory()) { > > >> >> page_dir = ptom_xen(page_dir); > > >> >> if (page_dir == NOT_PADDR) > > >> >>@@ -549,8 +559,16 @@ find_vmemmap_x86_64() > > >> >> struct vmap_pfns *vmapp, *vmaphead = NULL, *cur, *tail; > > >> >> > > >> >> init_level4_pgt = SYMBOL(init_level4_pgt); > > >> >>+ if (init_level4_pgt == NOT_FOUND_SYMBOL) > > >> >>+ init_level4_pgt = SYMBOL(init_top_pgt); > > >> >>+ > > >> >> if (init_level4_pgt == NOT_FOUND_SYMBOL) { > > >> >>- ERRMSG("init_level4_pgt not found\n"); > > >> >>+ ERRMSG("init_level4_pgt/init_top_pgt not found\n"); > > >> >>+ return FAILED; > > >> >>+ } > > >> >>+ > > >> >>+ if (SYMBOL(level4_kernel_pgt) != NOT_FOUND_SYMBOL) { > > >> >>+ ERRMSG("kernel is configured for 5-level page tables\n"); > > >> >> return FAILED; > > >> >> } > > >> >> pagestructsize = size_table.page; > > >> >>diff --git a/makedumpfile.c b/makedumpfile.c > > >> >>index f85003a..6e5ec34 100644 > > >> >>--- a/makedumpfile.c > > >> >>+++ b/makedumpfile.c > > >> >>@@ -1486,6 +1486,8 @@ get_symbol_info(void) > > >> >> SYMBOL_INIT(_stext, "_stext"); > > >> >> SYMBOL_INIT(swapper_pg_dir, "swapper_pg_dir"); > > >> >> SYMBOL_INIT(init_level4_pgt, "init_level4_pgt"); > > >> >>+ SYMBOL_INIT(level4_kernel_pgt, "level4_kernel_pgt"); > > >> >>+ SYMBOL_INIT(init_top_pgt, "init_top_pgt"); > > >> >> SYMBOL_INIT(vmlist, "vmlist"); > > >> >> SYMBOL_INIT(vmap_area_list, "vmap_area_list"); > > >> >> SYMBOL_INIT(node_online_map, "node_online_map"); > > >> >>@@ -2105,6 +2107,8 @@ write_vmcoreinfo_data(void) > > >> >> WRITE_SYMBOL("_stext", _stext); > > >> >> WRITE_SYMBOL("swapper_pg_dir", swapper_pg_dir); > > >> >> WRITE_SYMBOL("init_level4_pgt", init_level4_pgt); > > >> >>+ WRITE_SYMBOL("level4_kernel_pgt", level4_kernel_pgt); > > >> >>+ WRITE_SYMBOL("init_top_pgt", init_top_pgt); > > >> >> WRITE_SYMBOL("vmlist", vmlist); > > >> >> WRITE_SYMBOL("vmap_area_list", vmap_area_list); > > >> >> WRITE_SYMBOL("node_online_map", node_online_map); > > >> >>@@ -2500,6 +2504,8 @@ read_vmcoreinfo(void) > > >> >> READ_SYMBOL("_stext", _stext); > > >> >> READ_SYMBOL("swapper_pg_dir", swapper_pg_dir); > > >> >> READ_SYMBOL("init_level4_pgt", init_level4_pgt); > > >> >>+ READ_SYMBOL("level4_kernel_pgt", level4_kernel_pgt); > > >> >>+ READ_SYMBOL("init_top_pgt", init_top_pgt); > > >> >> READ_SYMBOL("vmlist", vmlist); > > >> >> READ_SYMBOL("vmap_area_list", vmap_area_list); > > >> >> READ_SYMBOL("node_online_map", node_online_map); > > >> >>diff --git a/makedumpfile.h b/makedumpfile.h > > >> >>index 8a05794..9357e47 100644 > > >> >>--- a/makedumpfile.h > > >> >>+++ b/makedumpfile.h > > >> >>@@ -1517,6 +1517,8 @@ struct symbol_table { > > >> >> unsigned long long _stext; > > >> >> unsigned long long swapper_pg_dir; > > >> >> unsigned long long init_level4_pgt; > > >> >>+ unsigned long long level4_kernel_pgt; > > >> >>+ unsigned long long init_top_pgt; > > >> >> unsigned long long vmlist; > > >> >> unsigned long long vmap_area_list; > > >> >> unsigned long long phys_base; > > >> >> > > >> >> > > >> >>-- > > >> >>Jeff Mahoney > > >> >>SUSE Labs > > >> > > > >> > > > >> > > > >> >_______________________________________________ > > >> >kexec mailing list > > >> >kexec at lists.infradead.org > > >> >http://lists.infradead.org/mailman/listinfo/kexec > > >> > > >> > > >> _______________________________________________ > > >> kexec mailing list > > >> kexec at lists.infradead.org > > >> http://lists.infradead.org/mailman/listinfo/kexec > > > > > >Thanks > > >Dave > > > > > > Thanks > Dave
