Benjamin Herrenschmidt writes:
> On Tue, 2014-07-29 at 12:25 +0530, Aneesh Kumar K.V wrote:
>> We want to make sure for usage like below we don't reorder the load.
>>
>> if (pmd_trans_huge(*pmdp)){
>>
>>get_hpte_slot_array(pmdp)
>> }
>
> Shouldn't we also make sure that we don't have lock
On Tue, 2014-07-29 at 12:25 +0530, Aneesh Kumar K.V wrote:
> We want to make sure for usage like below we don't reorder the load.
>
> if (pmd_trans_huge(*pmdp)){
>
>get_hpte_slot_array(pmdp)
> }
Shouldn't we also make sure that we don't have lock set ? (In case it's
in the middle of being u
Benjamin Herrenschmidt writes:
> On Wed, 2014-07-23 at 00:23 +0530, Aneesh Kumar K.V wrote:
>> > A better place for this would be right before the last write to the PMD
>> > (that's also clearing BUSY) in __hash_page_thp(). Basically, it's the
>> > normal lock ordering that's missing here, nothin
On Wed, 2014-07-23 at 00:23 +0530, Aneesh Kumar K.V wrote:
> > A better place for this would be right before the last write to the PMD
> > (that's also clearing BUSY) in __hash_page_thp(). Basically, it's the
> > normal lock ordering that's missing here, nothing specific to
> > mark_hpte_slot_valid
Benjamin Herrenschmidt writes:
> On Tue, 2014-07-15 at 20:22 +0530, Aneesh Kumar K.V wrote:
>> With hugepages, we store the hpte valid information in the pte page
>> whose address is stored in the second half of the PMD. Use a
>> write barrier to make sure that clearing pmd busy bit and updating
On Tue, 2014-07-15 at 20:22 +0530, Aneesh Kumar K.V wrote:
> With hugepages, we store the hpte valid information in the pte page
> whose address is stored in the second half of the PMD. Use a
> write barrier to make sure that clearing pmd busy bit and updating
> hpte valid info are ordered properly
With hugepages, we store the hpte valid information in the pte page
whose address is stored in the second half of the PMD. Use a
write barrier to make sure that clearing pmd busy bit and updating
hpte valid info are ordered properly.
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/include/asm/p
With hugepages, we store the hpte valid information in the pte page
whose address is stored in the second half of the PMD. Use a
write barrier to make sure that clearing pmd busy bit and updating
hpte valid info are ordered properly.
Signed-off-by: Aneesh Kumar K.V
---
arch/powerpc/include/asm/p
