[PATCH -V1 07/24] powerpc: Add size argument to pgtable_cache_add
Aneesh Kumar K.V
aneesh.kumar at linux.vnet.ibm.com
Mon Mar 4 22:02:24 EST 2013
Paul Mackerras <paulus at samba.org> writes:
> On Tue, Feb 26, 2013 at 01:34:57PM +0530, Aneesh Kumar K.V wrote:
>> From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>
>> We will use this later with THP changes to request for pmd table of double the size.
>> THP code does PTE page allocation along with large page request and deposit them
>> for later use. This is to ensure that we won't have any failures when we split
>> huge pages to regular pages.
>> On powerpc we want to use the deposited PTE page for storing hash pte slot and
>> secondary bit information for the HPTEs. Hence we save them in the second half
>> of the pmd table.
> Looks OK, but you should explain why you made the wholesale change of
> "shift" to "index". Is there some important semantic difference, or
> do you just prefer the "index" name for some reason?
Now with table_size argument, the first arg is no more the shift value,
rather it is index into the array. Hence i changed the variable name. I
will split that patch to make it easy for review.
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