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authorNick Piggin <npiggin@suse.de>2008-07-23 21:27:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:19 -0700
commite11bfbfcb08ef4223b863799897c19cdf7c5bc00 (patch)
tree2d66db5a2f92e3ad299e95a09d327f30f306aa24 /Documentation/kernel-parameters.txt
parentb4718e628dbf68a2dee23b5709e2aa3190409c56 (diff)
hugetlb: override default huge page size
Allow configurations with the default huge page size which is different to the traditional HPAGE_SIZE size. The default huge page size is the one represented in the legacy /proc ABIs, SHM, and which is defaulted to when mounting hugetlbfs filesystems. This is implemented with a new kernel option default_hugepagesz=, which defaults to HPAGE_SIZE if not specified. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index d55fd88fd0a9..30278e9e5211 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -783,6 +783,13 @@ and is between 256 and 4096 characters. It is defined in the file
CPU supports the "pdpe1gb" cpuinfo flag)
Note that 1GB pages can only be allocated at boot time
using hugepages= and not freed afterwards.
+ default_hugepagesz=
+ [same as hugepagesz=] The size of the default
+ HugeTLB page size. This is the size represented by
+ the legacy /proc/ hugepages APIs, used for SHM, and
+ default size when mounting hugetlbfs filesystems.
+ Defaults to the default architecture's huge page size
+ if not specified.
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