The patch titled
Subject: mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix
has been added to the -mm tree. Its filename is
mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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------------------------------------------------------
From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Subject: mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix
v4: makes debug-pagealloc disabled in default
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxx>
Cc: Michal Nazarewicz <mina86@xxxxxxxxxx>
Cc: Jungsoo Son <jungsoo.son@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/kernel-parameters.txt | 17 +++++++++--------
mm/page_alloc.c | 12 ++++++++----
2 files changed, 17 insertions(+), 12 deletions(-)
diff -puN Documentation/kernel-parameters.txt~mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix Documentation/kernel-parameters.txt
--- a/Documentation/kernel-parameters.txt~mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix
+++ a/Documentation/kernel-parameters.txt
@@ -829,6 +829,15 @@ bytes respectively. Such letter suffixes
CONFIG_DEBUG_PAGEALLOC, hence this option will not help
tracking down these problems.
+ debug_pagealloc=
+ [KNL] When CONFIG_DEBUG_PAGEALLOC is set, this
+ parameter enables the feature at boot time. In
+ default, it is disabled. We can avoid allocating huge
+ chunk of memory for debug pagealloc if we don't enable
+ it at boot time and the system will work mostly same
+ with the kernel built without CONFIG_DEBUG_PAGEALLOC.
+ on: enable the feature
+
debugpat [X86] Enable PAT debugging
decnet.addr= [HW,NET]
@@ -858,14 +867,6 @@ bytes respectively. Such letter suffixes
causing system reset or hang due to sending
INIT from AP to BSP.
- disable_debug_pagealloc
- [KNL] When CONFIG_DEBUG_PAGEALLOC is set, this
- parameter allows user to disable it at boot time.
- With this parameter, we can avoid allocating huge
- chunk of memory for debug pagealloc and then
- the system will work mostly same with the kernel
- built without CONFIG_DEBUG_PAGEALLOC.
-
disable_ddw [PPC/PSERIES]
Disable Dynamic DMA Window support. Use this if
to workaround buggy firmware.
diff -puN mm/page_alloc.c~mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix mm/page_alloc.c
--- a/mm/page_alloc.c~mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix
+++ a/mm/page_alloc.c
@@ -425,16 +425,20 @@ static inline void prep_zero_page(struct
#ifdef CONFIG_DEBUG_PAGEALLOC
unsigned int _debug_guardpage_minorder;
-bool _debug_pagealloc_enabled __read_mostly = true;
+bool _debug_pagealloc_enabled __read_mostly;
bool _debug_guardpage_enabled __read_mostly;
-static int __init early_disable_debug_pagealloc(char *buf)
+static int __init early_debug_pagealloc(char *buf)
{
- _debug_pagealloc_enabled = false;
+ if (!buf)
+ return -EINVAL;
+
+ if (strcmp(buf, "on") == 0)
+ _debug_pagealloc_enabled = true;
return 0;
}
-early_param("disable_debug_pagealloc", early_disable_debug_pagealloc);
+early_param("debug_pagealloc", early_debug_pagealloc);
static bool need_debug_guardpage(void)
{
_
Patches currently in -mm which might be from iamjoonsoo.kim@xxxxxxx are
mm-slab-slub-coding-style-whitespaces-and-tabs-mixture.patch
slab-print-slabinfo-header-in-seq-show.patch
mm-slab-reverse-iteration-on-find_mergeable.patch
mm-slub-fix-format-mismatches-in-slab_err-callers.patch
slab-improve-checking-for-invalid-gfp_flags.patch
slab-replace-smp_read_barrier_depends-with-lockless_dereference.patch
mm-introduce-single-zone-pcplists-drain.patch
mm-page_isolation-drain-single-zone-pcplists.patch
mm-cma-drain-single-zone-pcplists.patch
mm-memory_hotplug-failure-drain-single-zone-pcplists.patch
mm-compaction-pass-classzone_idx-and-alloc_flags-to-watermark-checking.patch
mm-compaction-pass-classzone_idx-and-alloc_flags-to-watermark-checking-fix.patch
mm-compaction-simplify-deferred-compaction.patch
mm-compaction-defer-only-on-compact_complete.patch
mm-compaction-always-update-cached-scanner-positions.patch
mm-compaction-always-update-cached-scanner-positions-fix.patch
mm-compaction-more-focused-lru-and-pcplists-draining.patch
mm-compaction-more-focused-lru-and-pcplists-draining-fix.patch
memcg-use-generic-slab-iterators-for-showing-slabinfo.patch
mm-embed-the-memcg-pointer-directly-into-struct-page.patch
mm-embed-the-memcg-pointer-directly-into-struct-page-fix.patch
mm-page_cgroup-rename-file-to-mm-swap_cgroupc.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code-fix.patch
mm-move-page-mem_cgroup-bad-page-handling-into-generic-code-fix-2.patch
lib-bitmap-added-alignment-offset-for-bitmap_find_next_zero_area.patch
mm-cma-align-to-physical-address-not-cma-region-position.patch
mm-debug-pagealloc-cleanup-page-guard-code.patch
include-linux-kmemleakh-needs-slabh.patch
mm-page_ext-resurrect-struct-page-extending-code-for-debugging.patch
mm-debug-pagealloc-prepare-boottime-configurable-on-off.patch
mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable.patch
mm-debug-pagealloc-make-debug-pagealloc-boottime-configurable-fix.patch
mm-nommu-use-alloc_pages_exact-rather-than-its-own-implementation.patch
mm-nommu-use-alloc_pages_exact-rather-than-its-own-implementation-fix.patch
stacktrace-introduce-snprint_stack_trace-for-buffer-output.patch
mm-page_owner-keep-track-of-page-owners.patch
mm-page_owner-correct-owner-information-for-early-allocated-pages.patch
documentation-add-new-page_owner-document.patch
zsmalloc-merge-size_class-to-reduce-fragmentation.patch
slab-fix-cpuset-check-in-fallback_alloc.patch
slub-fix-cpuset-check-in-get_any_partial.patch
mm-cma-make-kmemleak-ignore-cma-regions.patch
mm-cma-split-cma-reserved-in-dmesg-log.patch
fs-proc-include-cma-info-in-proc-meminfo.patch
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