Subject: + mm-update-comment-for-default_max_map_count.patch added to -mm tree
To: kirill.shutemov@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 06 May 2014 14:47:10 -0700
The patch titled
Subject: mm: update comment for DEFAULT_MAX_MAP_COUNT
has been added to the -mm tree. Its filename is
mm-update-comment-for-default_max_map_count.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-update-comment-for-default_max_map_count.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-update-comment-for-default_max_map_count.patch
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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: mm: update comment for DEFAULT_MAX_MAP_COUNT
With ELF extended numbering 16-bit bound is not hard limit any more.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/sched/sysctl.h | 4 ++++
1 file changed, 4 insertions(+)
diff -puN include/linux/sched/sysctl.h~mm-update-comment-for-default_max_map_count include/linux/sched/sysctl.h
--- a/include/linux/sched/sysctl.h~mm-update-comment-for-default_max_map_count
+++ a/include/linux/sched/sysctl.h
@@ -25,6 +25,10 @@ enum { sysctl_hung_task_timeout_secs = 0
* Because the kernel adds some informative sections to a image of program at
* generating coredump, we need some margin. The number of extra sections is
* 1-3 now and depends on arch. We use "5" as safe margin, here.
+ *
+ * ELF extended numbering allows more then 65535 sections, so 16-bit bound is
+ * not hard limit any more. Although some userspace tools can be surprised by
+ * that.
*/
#define MAPCOUNT_ELF_CORE_MARGIN (5)
#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
pagewalk-update-page-table-walker-core.patch
pagewalk-add-walk_page_vma.patch
smaps-redefine-callback-functions-for-page-table-walker.patch
clear_refs-redefine-callback-functions-for-page-table-walker.patch
pagemap-redefine-callback-functions-for-page-table-walker.patch
numa_maps-redefine-callback-functions-for-page-table-walker.patch
memcg-redefine-callback-functions-for-page-table-walker.patch
arch-powerpc-mm-subpage-protc-use-walk_page_vma-instead-of-walk_page_range.patch
pagewalk-remove-argument-hmask-from-hugetlb_entry.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
thp-consolidate-assert-checks-in-__split_huge_page.patch
mm-huge_memoryc-complete-conversion-to-pr_foo.patch
mm-pass-vm_bug_on-reason-to-dump_page.patch
mm-pass-vm_bug_on-reason-to-dump_page-fix.patch
hugetlb-prep_compound_gigantic_page-drop-__init-marker.patch
hugetlb-add-hstate_is_gigantic.patch
hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
hugetlb-move-helpers-up-in-the-file.patch
hugetlb-add-support-for-gigantic-page-allocation-at-runtime.patch
mm-swapc-introduce-put_refcounted_compound_page-helpers-for-spliting-put_compound_page.patch
mm-swapc-split-put_compound_page-function.patch
mm-introdule-compound_head_by_tail.patch
mm-move-get_user_pages-related-code-to-separate-file.patch
mm-extract-in_gate_area-case-from-__get_user_pages.patch
mm-cleanup-follow_page_mask.patch
mm-extract-code-to-fault-in-a-page-from-__get_user_pages.patch
mm-cleanup-__get_user_pages.patch
mm-rmapc-make-page_referenced_one-and-try_to_unmap_one-static.patch
mm-update-comment-for-default_max_map_count.patch
mm-update-comment-for-default_max_map_count-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
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