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 <[email protected]>
---
filesystems/proc.txt | 15 +++++++++++++++
kernel-parameters.txt | 16 ++++++++++++++++
sysctl/vm.txt | 3 ++-
3 files changed, 33 insertions(+), 1 deletion(-)
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/filesystems/proc.txt linux-2.6.20-rc4-mm1-008_documentation/Documentation/filesystems/proc.txt
--- linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/filesystems/proc.txt 2007-01-07 05:45:51.000000000 +0000
+++ linux-2.6.20-rc4-mm1-008_documentation/Documentation/filesystems/proc.txt 2007-01-25 18:27:28.000000000 +0000
@@ -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 paramter 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 repeatly entering the desired value
+into nr_hugepages and triggering page reclaim.
+
laptop_mode
-----------
diff -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/kernel-parameters.txt linux-2.6.20-rc4-mm1-008_documentation/Documentation/kernel-parameters.txt
--- linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/kernel-parameters.txt 2007-01-17 17:07:54.000000000 +0000
+++ linux-2.6.20-rc4-mm1-008_documentation/Documentation/kernel-parameters.txt 2007-01-25 18:27:28.000000000 +0000
@@ -762,6 +762,22 @@ 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 sybsystem. 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 -rup -X /usr/src/patchset-0.6/bin//dontdiff linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/sysctl/vm.txt linux-2.6.20-rc4-mm1-008_documentation/Documentation/sysctl/vm.txt
--- linux-2.6.20-rc4-mm1-007_ia64_set_kernelcore/Documentation/sysctl/vm.txt 2007-01-17 17:07:54.000000000 +0000
+++ linux-2.6.20-rc4-mm1-008_documentation/Documentation/sysctl/vm.txt 2007-01-25 18:27:28.000000000 +0000
@@ -39,7 +39,8 @@ 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
-
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