Displaying 2 results from an estimated 2 matches for "sg_gaps".
2019 Jul 30
1
[PATCH 07/13] mm: remove the page_shift member from struct hmm_range
...ith variable length per entry,
> so even if we pass multiple pages per entry from hmm it could coalesce
> them.
When the driver takes faults it has to repair the MR mapping, and
fixing a page in the middle of a variable length SGL would be pretty
complicated. Even so, I don't think the SG_GAPs feature and ODP are
compatible - I'm pretty sure ODP has to be page lists not SGL..
However, what ODP can maybe do is represent a full multi-level page
table, so we could have 2M entries that map to a single DMA or to
another page table w/ 4k pages (have to check on this)
But the driver isn...
2019 Jul 30
2
[PATCH 07/13] mm: remove the page_shift member from struct hmm_range
On Tue, Jul 30, 2019 at 08:51:57AM +0300, Christoph Hellwig wrote:
> All users pass PAGE_SIZE here, and if we wanted to support single
> entries for huge pages we should really just add a HMM_FAULT_HUGEPAGE
> flag instead that uses the huge page size instead of having the
> caller calculate that size once, just for the hmm code to verify it.
I suspect this was added for the ODP