Messages in this thread | | | Date | Fri, 1 Dec 2006 08:55:20 +0100 | From | Jens Axboe <> | Subject | Re: [patch]VMSPLIT_2G conflicts with PAE |
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On Fri, Dec 01 2006, Shaohua Li wrote: > PAGE_OFFSET is 0x78000000 with VMSPLIT_2G, this address is in the middle > of the second pgd entry with pae enabled. This breaks assumptions > (address is aligned to pgd entry's address) in a lot of places like > pagetable_init. Fixing the assumptions is hard (eg, low mapping). SO I > just changed the address to 0x80000000. > > Signed-off-by: Shaohua Li <shaohua.li@intel.com> > > diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig > index 8ff1c6f..fddfb26 100644 > --- a/arch/i386/Kconfig > +++ b/arch/i386/Kconfig > @@ -532,7 +532,7 @@ endchoice > config PAGE_OFFSET > hex > default 0xB0000000 if VMSPLIT_3G_OPT > - default 0x78000000 if VMSPLIT_2G > + default 0x80000000 if VMSPLIT_2G > default 0x40000000 if VMSPLIT_1G > default 0xC0000000
0x78000000 was chosen since it gives you the full 2G as low memory, if you mave it 0x80000000 then you still have a little highmem and need that turned on.
-- Jens Axboe
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