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x86: add hugepagesz option on 64-bit

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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>
This commit is contained in:
Andi Kleen
2008-07-23 21:27:51 -07:00
committed by Linus Torvalds
parent 39c11e6c05
commit b4718e628d
3 changed files with 28 additions and 2 deletions
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11
Documentation/kernel-parameters.txt
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@ -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