The patch titled
Add documentation for additional boot parameter and sysctl
has been added to the -mm tree. Its filename is
add-documentation-for-additional-boot-parameter-and-sysctl.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Add documentation for additional boot parameter and sysctl
From: Mel Gorman <mel@xxxxxxxxx>
Once all patches are applied, a new command-line parameter exist and a new
sysctl. This patch adds the necessary documentation.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/filesystems/proc.txt | 15 +++++++++++++++
Documentation/kernel-parameters.txt | 16 ++++++++++++++++
Documentation/sysctl/vm.txt | 3 ++-
3 files changed, 33 insertions(+), 1 deletion(-)
diff -puN Documentation/filesystems/proc.txt~add-documentation-for-additional-boot-parameter-and-sysctl Documentation/filesystems/proc.txt
--- a/Documentation/filesystems/proc.txt~add-documentation-for-additional-boot-parameter-and-sysctl
+++ a/Documentation/filesystems/proc.txt
@@ -1288,6 +1288,21 @@ nr_hugepages configures number of hugetl
hugetlb_shm_group contains group id that is allowed to create SysV shared
memory segment using hugetlb page.
+hugepages_treat_as_movable
+--------------------------
+
+This parameter is only useful when kernelcore= is specified at boot time to
+create ZONE_MOVABLE for pages that may be reclaimed or migrated. Huge pages
+are not movable so are not normally allocated from ZONE_MOVABLE. A non-zero
+value written to hugepages_treat_as_movable allows huge pages to be allocated
+from ZONE_MOVABLE.
+
+Once enabled, the ZONE_MOVABLE is treated as an area of memory the huge
+pages pool can easily grow or shrink within. Assuming that applications are
+not running that mlock() a lot of memory, it is likely the huge pages pool
+can grow to the size of ZONE_MOVABLE by repeatedly entering the desired value
+into nr_hugepages and triggering page reclaim.
+
laptop_mode
-----------
diff -puN Documentation/kernel-parameters.txt~add-documentation-for-additional-boot-parameter-and-sysctl Documentation/kernel-parameters.txt
--- a/Documentation/kernel-parameters.txt~add-documentation-for-additional-boot-parameter-and-sysctl
+++ a/Documentation/kernel-parameters.txt
@@ -763,6 +763,22 @@ and is between 256 and 4096 characters.
js= [HW,JOY] Analog joystick
See Documentation/input/joystick.txt.
+ kernelcore=nn[KMG] [KNL,IA-32,IA-64,PPC,X86-64] This parameter
+ specifies the amount of memory usable by the kernel
+ for non-movable allocations. The requested amount is
+ spread evenly throughout all nodes in the system. The
+ remaining memory in each node is used for Movable
+ pages. In the event, a node is too small to have both
+ kernelcore and Movable pages, kernelcore pages will
+ take priority and other nodes will have a larger number
+ of kernelcore pages. The Movable zone is used for the
+ allocation of pages that may be reclaimed or moved
+ by the page migration subsystem. This means that
+ HugeTLB pages may not be allocated from this zone.
+ Note that allocations like PTEs-from-HighMem still
+ use the HighMem zone if it exists, and the Normal
+ zone if it does not.
+
keepinitrd [HW,ARM]
kstack=N [IA-32,X86-64] Print N words from the kernel stack
diff -puN Documentation/sysctl/vm.txt~add-documentation-for-additional-boot-parameter-and-sysctl Documentation/sysctl/vm.txt
--- a/Documentation/sysctl/vm.txt~add-documentation-for-additional-boot-parameter-and-sysctl
+++ a/Documentation/sysctl/vm.txt
@@ -36,7 +36,8 @@ Currently, these files are in /proc/sys/
dirty_ratio, dirty_background_ratio, dirty_expire_centisecs,
dirty_writeback_centisecs, vfs_cache_pressure, laptop_mode,
-block_dump, swap_token_timeout, drop-caches:
+block_dump, swap_token_timeout, drop-caches,
+hugepages_treat_as_movable:
See Documentation/filesystems/proc.txt
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
add-a-bitmap-that-is-used-to-track-flags-affecting-a-block-of-pages.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-low-memory-that-may-be-migrated.patch
split-the-free-lists-for-movable-and-unmovable-allocations.patch
choose-pages-from-the-per-cpu-list-based-on-migration-type.patch
add-a-configure-option-to-group-pages-by-mobility.patch
drain-per-cpu-lists-when-high-order-allocations-fail.patch
move-free-pages-between-lists-on-steal.patch
group-short-lived-and-reclaimable-kernel-allocations.patch
group-high-order-atomic-allocations.patch
bias-the-placement-of-kernel-pages-at-lower-pfns.patch
be-more-agressive-about-stealing-when-migrate_reclaimable-allocations-fallback.patch
create-the-zone_movable-zone.patch
allow-huge-page-allocations-to-use-gfp_high_movable.patch
x86-specify-amount-of-kernel-memory-at-boot-time.patch
ppc-and-powerpc-specify-amount-of-kernel-memory-at-boot-time.patch
x86_64-specify-amount-of-kernel-memory-at-boot-time.patch
ia64-specify-amount-of-kernel-memory-at-boot-time.patch
add-documentation-for-additional-boot-parameter-and-sysctl.patch
ext2-reservations.patch
add-__gfp_movable-for-callers-to-flag-allocations-from-high-memory-that-may-be-migrated-swap-prefetch.patch
add-debugging-aid-for-memory-initialisation-problems.patch
add-debugging-aid-for-memory-initialisation-problems-fix.patch
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