From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 4 Jun 2008 10:51:30 -0700 From: Randy Dunlap Subject: Re: [patch 14/21] x86: add hugepagesz option on 64-bit Message-Id: <20080604105130.cc4ca4e8.randy.dunlap@oracle.com> In-Reply-To: <20080604113112.777819936@amd.local0.net> References: <20080604112939.789444496@amd.local0.net> <20080604113112.777819936@amd.local0.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: npiggin@suse.de Cc: akpm@linux-foundation.org, linux-mm@kvack.org List-ID: On Wed, 04 Jun 2008 21:29:53 +1000 npiggin@suse.de wrote: > 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 > Signed-off-by: Nick Piggin > --- > Documentation/kernel-parameters.txt | 11 +++++++++-- > arch/x86/mm/hugetlbpage.c | 17 +++++++++++++++++ > include/asm-x86/page.h | 2 ++ > 3 files changed, 28 insertions(+), 2 deletions(-) > > Index: linux-2.6/Documentation/kernel-parameters.txt > =================================================================== > --- linux-2.6.orig/Documentation/kernel-parameters.txt 2008-06-04 20:47:33.000000000 +1000 > +++ linux-2.6/Documentation/kernel-parameters.txt 2008-06-04 20:51:24.000000000 +1000 > @@ -765,8 +765,15 @@ and is between 256 and 4096 characters. > 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 Change this x86 to x86-64 like it is both above and below here? > + 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) 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 --- ~Randy -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org