The patch titled Subject: vmcore: allocate per-cpu crash_notes objects on page-size boundary has been added to the -mm tree. Its filename is vmcore-allocate-per-cpu-crash_notes-objects-on-page-size-boundary.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx> Subject: vmcore: allocate per-cpu crash_notes objects on page-size boundary To satisfy mmap()'s page-size boundary requirement, allocate per-cpu crash_notes objects on page-size boundary. /proc/vmcore on the 2nd kernel checks if each note objects is allocated on page-size boundary. If there's some object not satisfying the page-size boundary requirement, /proc/vmcore doesn't provide mmap() interface. Signed-off-by: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx> Cc: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx> Cc: Vivek Goyal <vgoyal@xxxxxxxxxx> Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/kexec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN kernel/kexec.c~vmcore-allocate-per-cpu-crash_notes-objects-on-page-size-boundary kernel/kexec.c --- a/kernel/kexec.c~vmcore-allocate-per-cpu-crash_notes-objects-on-page-size-boundary +++ a/kernel/kexec.c @@ -1223,7 +1223,8 @@ void crash_save_cpu(struct pt_regs *regs static int __init crash_notes_memory_init(void) { /* Allocate memory for saving cpu registers. */ - crash_notes = alloc_percpu(note_buf_t); + crash_notes = __alloc_percpu(roundup(sizeof(note_buf_t), PAGE_SIZE), + PAGE_SIZE); if (!crash_notes) { printk("Kexec: Memory allocation for saving cpu register" " states failed\n"); _ Patches currently in -mm which might be from d.hatayama@xxxxxxxxxxxxxx are vmcore-reference-e_phoff-member-explicitly-to-get-position-of-program-header-table.patch vmcore-clean-up-by-removing-unnecessary-variable.patch vmcore-rearrange-program-headers-without-assuming-consequtive-pt_note-entries.patch vmcore-sysfs-export-elf-note-segment-size-instead-of-vmcoreinfo-data-size.patch vmcore-allocate-buffer-for-elf-headers-on-page-size-alignment.patch vmcore-round-up-buffer-size-of-elf-headers-by-page_size.patch vmcore-procfs-introduce-a-flag-to-distinguish-objects-copied-in-2nd-kernel.patch vmcore-copy-non-page-size-aligned-head-and-tail-pages-in-2nd-kernel.patch vmcore-modify-vmcore-clean-up-function-to-free-buffer-on-2nd-kernel.patch vmcore-clean-up-read_vmcore.patch vmcore-read-buffers-for-vmcore-objects-copied-from-old-memory.patch vmcore-allocate-per-cpu-crash_notes-objects-on-page-size-boundary.patch kexec-allocate-vmcoreinfo-note-buffer-on-page-size-boundary.patch kexec-elf-introduce-nt_vmcore_debuginfo-note-type.patch elf-introduce-nt_vmcore_pad-type.patch kexec-fill-note-buffers-by-nt_vmcore_pad-notes-in-page-size-boundary.patch vmcore-check-nt_vmcore_pad-as-a-mark-indicating-the-end-of-elf-note-buffer.patch vmcore-check-if-vmcore-objects-satify-mmaps-page-size-boundary-requirement.patch vmcore-round-up-offset-of-vmcore-object-in-page-size-boundary.patch vmcore-count-holes-generated-by-round-up-operation-for-vmcore-size.patch vmcore-introduce-mmap_vmcore.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html