On 11.07.24 20:08, Jason A. Donenfeld wrote:
On Thu, Jul 11, 2024 at 07:56:39PM +0200, Jason A. Donenfeld wrote:
On Thu, Jul 11, 2024 at 07:54:34PM +0200, Jason A. Donenfeld wrote:
On Thu, Jul 11, 2024 at 07:27:27PM +0200, David Hildenbrand wrote:
PG_owner_priv_1 maps to PG_swapcache? :)
Maybe the combination !swapbacked && swapcache could be used to indicate
such folios. (we will never set swapbacked)
But likely we have to be a bit careful here. We don't want
folio_test_swapcache() to return for folios that ... are not in the
swapcache.
I was thinking that too, but I'm afraid it's going to be another
whack-a-mole nightmare. Even for things like task_mmu in procfs that
show stats, that's going to be wonky.
Any other flags we can overload that aren't going to be already used in
our case?
PG_error / folio_set_error seems unused in the non-IO case.
Note that Willy is about to remove PG_error IIRC.
And PG_large_rmappable seems to only be used for hugetlb branches.
It should be set for THP/large folios.
--
Cheers,
David / dhildenb
