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authorAndi Kleen <ak@suse.de>2008-07-23 21:27:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:19 -0700
commitb4718e628dbf68a2dee23b5709e2aa3190409c56 (patch)
treee685b2bd36a0fe731b128d2814996a693561d288 /Documentation/kernel-parameters.txt
parent39c11e6c05b7fedbf7ed4df3908b25f622d56204 (diff)
downloadlwn-b4718e628dbf68a2dee23b5709e2aa3190409c56.tar.gz
lwn-b4718e628dbf68a2dee23b5709e2aa3190409c56.zip
x86: add hugepagesz option on 64-bit
Add an hugepagesz=... option similar to IA64, PPC etc. to x86-64. This finally allows to select GB pages for hugetlbfs in x86 now that all the infrastructure is in place. Signed-off-by: Andi Kleen <ak@suse.de> 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.txt11
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 5e20ccb5a736..d55fd88fd0a9 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -774,8 +774,15 @@ and is between 256 and 4096 characters. It is defined in the file
hisax= [HW,ISDN]
See Documentation/isdn/README.HiSax.
- hugepages= [HW,X86-32,IA-64] Maximal number of HugeTLB pages.
- hugepagesz= [HW,IA-64,PPC] The size of the HugeTLB pages.
+ hugepages= [HW,X86-32,IA-64] HugeTLB pages to allocate at boot.
+ hugepagesz= [HW,IA-64,PPC,X86-64] The size of the HugeTLB pages.
+ On x86 this option can be specified multiple times
+ interleaved with hugepages= to reserve huge pages
+ of different sizes. Valid pages sizes on x86-64
+ are 2M (when the CPU supports "pse") and 1G (when the
+ CPU supports the "pdpe1gb" cpuinfo flag)
+ Note that 1GB pages can only be allocated at boot time
+ using hugepages= and not freed afterwards.
i8042.direct [HW] Put keyboard port into non-translated mode
i8042.dumbkbd [HW] Pretend that controller can only read data from