49 lines
2.0 KiB
Diff
49 lines
2.0 KiB
Diff
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From 910bd8c627ea16ea9bcf70c153197aaba473b6b9 Mon Sep 17 00:00:00 2001
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From: Alexandre Frade <kernel@xanmod.org>
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Date: Sun, 28 Apr 2024 09:06:54 +0000
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Subject: [PATCH 12/18] XANMOD: mm: Raise max_map_count default value
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Signed-off-by: Alexandre Frade <kernel@xanmod.org>
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---
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Documentation/admin-guide/sysctl/vm.rst | 2 +-
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include/linux/mm.h | 11 ++++++-----
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2 files changed, 7 insertions(+), 6 deletions(-)
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--- a/Documentation/admin-guide/sysctl/vm.rst
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+++ b/Documentation/admin-guide/sysctl/vm.rst
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@@ -461,7 +461,7 @@ While most applications need less than a
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programs, particularly malloc debuggers, may consume lots of them,
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e.g., up to one or two maps per allocation.
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-The default value is 65530.
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+The XanMod default value is 2147483642.
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mem_profiling
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--- a/include/linux/mm.h
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+++ b/include/linux/mm.h
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@@ -191,17 +191,18 @@ static inline void __mm_zero_struct_page
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*
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* When a program's coredump is generated as ELF format, a section is created
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* per a vma. In ELF, the number of sections is represented in unsigned short.
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- * This means the number of sections should be smaller than 65535 at coredump.
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+ * This means the number of sections should be smaller than 2147483647 at
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+ * coredump.
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* Because the kernel adds some informative sections to a image of program at
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* generating coredump, we need some margin. The number of extra sections is
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* 1-3 now and depends on arch. We use "5" as safe margin, here.
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*
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- * ELF extended numbering allows more than 65535 sections, so 16-bit bound is
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- * not a hard limit any more. Although some userspace tools can be surprised by
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- * that.
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+ * ELF extended numbering allows more than 2147483647 sections, so 16-bit bound
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+ * is not a hard limit any more. Although some userspace tools can be surprised
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+ * by that.
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*/
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#define MAPCOUNT_ELF_CORE_MARGIN (5)
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-#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
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+#define DEFAULT_MAX_MAP_COUNT (INT_MAX - MAPCOUNT_ELF_CORE_MARGIN)
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extern int sysctl_max_map_count;
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