89 messages in org.kernel.vger.linux-kernelRe: 2G memory split
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Jens AxboeJan 10, 2006 4:58 am 
Ingo MolnarJan 10, 2006 5:29 am 
Jens AxboeJan 10, 2006 5:37 am 
Byron StanoszekJan 10, 2006 5:43 am 
Jens AxboeJan 10, 2006 5:47 am 
Mikael PetterssonJan 10, 2006 5:47 am 
Jens AxboeJan 10, 2006 5:53 am 
Gerd HoffmannJan 10, 2006 6:09 am 
Mark LordJan 10, 2006 6:11 am 
Jens AxboeJan 10, 2006 6:21 am 
Jens AxboeJan 10, 2006 6:22 am 
Jens AxboeJan 10, 2006 6:25 am 
Jens AxboeJan 10, 2006 6:39 am 
Ingo MolnarJan 10, 2006 6:43 am 
Jens AxboeJan 10, 2006 7:03 am 
Mark LordJan 10, 2006 7:11 am.patch
Mikael PetterssonJan 10, 2006 7:23 am 
Linus TorvaldsJan 10, 2006 8:14 am 
Jeff V. MerkeyJan 10, 2006 8:30 am.patch, .patch
Mark LordJan 10, 2006 8:39 am 
Linus TorvaldsJan 10, 2006 8:52 am 
Jeff V. MerkeyJan 10, 2006 8:56 am 
Jeff V. MerkeyJan 10, 2006 9:00 am 
Mark LordJan 10, 2006 9:06 am 
Sergey VlasovJan 10, 2006 9:07 am 
Jeff V. MerkeyJan 10, 2006 9:13 am 
Jeff V. MerkeyJan 10, 2006 9:17 am 
Linus TorvaldsJan 10, 2006 9:28 am 
Jens AxboeJan 10, 2006 9:32 am 
Jeff V. MerkeyJan 10, 2006 9:36 am 
Mark LordJan 10, 2006 9:36 am 
Bernd EckenfelsJan 10, 2006 9:48 am 
Martin BlighJan 10, 2006 10:14 am 
Coywolf Qi HuntJan 10, 2006 10:27 am 
Coywolf Qi HuntJan 10, 2006 10:32 am 
Linus TorvaldsJan 10, 2006 10:34 am 
Martin BlighJan 10, 2006 10:39 am 
Mark LordJan 10, 2006 10:45 am 
Martin BlighJan 10, 2006 10:46 am 
Lennart SorensenJan 10, 2006 10:50 am 
Dave HansenJan 10, 2006 10:54 am 
Mark LordJan 10, 2006 10:57 am 
Jens AxboeJan 10, 2006 10:57 am 
Mark LordJan 10, 2006 11:01 am 
Dave HansenJan 10, 2006 11:04 am 
Jeff V. MerkeyJan 10, 2006 11:12 am 
Mark LordJan 10, 2006 11:15 am 
Jens AxboeJan 10, 2006 11:26 am 
Jeff V. MerkeyJan 10, 2006 11:30 am 
Jens AxboeJan 10, 2006 11:41 am 
Bernd EckenfelsJan 10, 2006 12:17 pm 
Jens AxboeJan 10, 2006 12:27 pm 
Jan EngelhardtJan 10, 2006 12:42 pm 
Alan CoxJan 10, 2006 12:54 pm 
Jens AxboeJan 10, 2006 1:02 pm 
Con KolivasJan 10, 2006 4:25 pm 
J.A. MagallonJan 10, 2006 5:12 pm 
Bernd EckenfelsJan 11, 2006 12:39 am 
Jens AxboeJan 11, 2006 2:05 am 
Jens AxboeJan 11, 2006 2:15 am 
Greg NorrisJan 11, 2006 8:00 am 
Mark LordJan 11, 2006 9:12 am 
Greg NorrisJan 11, 2006 9:44 am 
Herbert PoetzlFeb 1, 2006 2:22 pm 
Ulrich MuellerFeb 2, 2006 3:03 am 
Jan EngelhardtFeb 2, 2006 12:55 pm 
Mark LordFeb 3, 2006 2:38 pm 
Ulrich MuellerFeb 4, 2006 2:22 am 
Jens AxboeFeb 4, 2006 2:35 am 
Jan EngelhardtFeb 4, 2006 3:04 am 
Jan EngelhardtFeb 4, 2006 3:05 am 
Mark LordFeb 4, 2006 5:57 am 
J.A. MagallonFeb 5, 2006 7:32 am 
Arjan van de VenFeb 5, 2006 7:38 am 
Barry K. NathanFeb 5, 2006 10:41 am 
Bodo EggertFeb 5, 2006 12:20 pm 
Jan EngelhardtFeb 5, 2006 1:13 pm 
Arjan van de VenFeb 5, 2006 1:18 pm 
Jeff DikeFeb 5, 2006 2:12 pm 
Jan EngelhardtFeb 6, 2006 6:56 am 
Herbert PoetzlFeb 6, 2006 4:41 pm 
Mark RustadFeb 6, 2006 6:50 pm 
Bernd PetrovitschFeb 7, 2006 1:37 am 
Adrian BunkFeb 7, 2006 4:19 am 
Ulrich MuellerFeb 7, 2006 6:05 am 
Adrian BunkFeb 7, 2006 6:42 am 
Jan EngelhardtFeb 9, 2006 8:06 am 
Kirill KorotaevApr 10, 2006 7:10 am 
Mark LordApr 10, 2006 7:39 am 
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Subject:Re: 2G memory splitActions...
From:Dave Hansen (have@us.ibm.com)
Date:Jan 10, 2006 10:54:48 am
List:org.kernel.vger.linux-kernel

On Tue, 2006-01-10 at 10:34 -0800, Linus Torvalds wrote:

On Tue, 10 Jan 2006, Martin Bligh wrote:

The non-1GB-aligned ones need to be disbarred when PAE is on, I think.

Well, right now _all_ the non-3:1 cases need to be disbarred. I think we depend on the kernel mapping only ever being the _one_ last entry in the top-level page table, which is only true with the 3:1 mapping.

It actually "just works". We have a 16GB machine that gets a lot of filesystem activity and use a 2:2 split all the time. Appended patch is all that we need.

It was for other reasons at the time, but I think we fixed a bunch of the multiple kernel mapping PMDs back in 2.5. Some remnants of that stuff are still around.

http://marc.theaimsgroup.com/?l=linux-kernel&m=104197008817507&w=2

diff -purN -X /home/dvhart/.diff.exclude
/home/linux/views/linux-2.6.12/include/asm-i386/page.h
2.6.12-uptime/include/asm-i386/page.h --- /home/linux/views/linux-2.6.12/include/asm-i386/page.h 2005-03-02
03:00:08.000000000 -0800 +++ 2.6.12-uptime/include/asm-i386/page.h 2005-07-27 11:53:40.000000000 -0700 @@ -122,9 +122,9 @@ extern int sysctl_legacy_va_layout; #endif /* __ASSEMBLY__ */

#ifdef __ASSEMBLY__ -#define __PAGE_OFFSET (0xC0000000) +#define __PAGE_OFFSET (0x80000000) #else -#define __PAGE_OFFSET (0xC0000000UL) +#define __PAGE_OFFSET (0x80000000UL) #endif

-- Dave