Messages in this thread | | | Date | Tue, 10 Jan 2006 09:56:45 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: 2G memory split |
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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. > >But I didn't check. > >
No. It works fine (or seems to) with 2:2 mapping. I've tested with these extensively and am shipping products on the 1U appliances with 2:2 and I have never seen any problems with 2.6.9-2.6.13.
The only unpleasant side affect with 3:1 is user apps seem to rely on swap space a little more than I like -- perhaps this is the side affect you are referring to?
RH ES uses 4:4 which is ideal and superior to this hack.
Jeff
> Linus >- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/ > > >
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