On Wed, Apr 03, 2024 at 06:24:38PM +, Christophe Leroy wrote:
> > If it is a software walker there might be value in just aligning to
> > the contig pte scheme in all levels and forgetting about the variable
> > size page table levels. That quarter page stuff is a PITA to manage
> > the memory
Le 27/03/2024 à 17:57, Jason Gunthorpe a écrit :
> On Wed, Mar 27, 2024 at 09:58:35AM +, Christophe Leroy wrote:
>>> Just general remarks on the ones with huge pages:
>>>
>>>hash 64k and hugepage 16M/16G
>>>radix 64k/radix hugepage 2M/1G
>>>radix 4k/radix hugepage 2M/1G
>>>
On Wed, Mar 27, 2024 at 09:58:35AM +, Christophe Leroy wrote:
> > Just general remarks on the ones with huge pages:
> >
> > hash 64k and hugepage 16M/16G
> > radix 64k/radix hugepage 2M/1G
> > radix 4k/radix hugepage 2M/1G
> > nohash 32
> >- I think this is just a normal x86 like
Le 26/03/2024 à 16:01, Jason Gunthorpe a écrit :
> On Mon, Mar 25, 2024 at 07:05:01PM +, Christophe Leroy wrote:
>
>> Not looked into details yet, but I guess so.
>>
>> By the way there is a wiki dedicated to huge pages on powerpc, you can
>> have a look at it here :
>>
On Mon, Mar 25, 2024 at 07:05:01PM +, Christophe Leroy wrote:
> Not looked into details yet, but I guess so.
>
> By the way there is a wiki dedicated to huge pages on powerpc, you can
> have a look at it here :
> https://github.com/linuxppc/wiki/wiki/Huge-pages , maybe you'll find
> good
Le 25/03/2024 à 17:19, Jason Gunthorpe a écrit :
> On Mon, Mar 25, 2024 at 03:55:54PM +0100, Christophe Leroy wrote:
>> Unlike many architectures, powerpc 8xx hardware tablewalk requires
>> a two level process for all page sizes, allthough second level only
>> has one entry when pagesize is 8M.
On Mon, Mar 25, 2024 at 03:55:54PM +0100, Christophe Leroy wrote:
> Unlike many architectures, powerpc 8xx hardware tablewalk requires
> a two level process for all page sizes, allthough second level only
> has one entry when pagesize is 8M.
>
> To fit with Linux page table topology and without
Unlike many architectures, powerpc 8xx hardware tablewalk requires
a two level process for all page sizes, allthough second level only
has one entry when pagesize is 8M.
To fit with Linux page table topology and without requiring special
page directory layout like hugepd, the page entry will be
