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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2014-06-04 16:08:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:05 -0700
commit3fb1c8dcfcda2f5bfb7d79d8b08bf2f04b1eed8f (patch)
tree2927529e2ee9a6e63c95024d2fac19ebe2ae569a /include
parentaf4459d3636790735fccd83f0337c8380a0a4cc2 (diff)
mm: update comment for DEFAULT_MAX_MAP_COUNT
With ELF extended numbering 16-bit bound is not hard limit any more. [akpm@linux-foundation.org: fix typo] Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/sched/sysctl.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sched/sysctl.h b/include/linux/sched/sysctl.h
index 8045a554cafb..596a0e007c62 100644
--- a/include/linux/sched/sysctl.h
+++ b/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 than 65535 sections, so 16-bit bound is
+ * not a 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)