Re: [PATCH v3 05/15] mm: introduce and use vma_filebacked_address()
"Lorenzo Stoakes (ARM)" <[email protected]>
| Newsgroups | gmane.linux.file-systems,gmane.linux.kernel.mm,gmane.linux.kernel |
|---|---|
| Message-ID | <anBpy-uFv7Ghdr1q@lucifer> |
On Mon, Aug 03, 2026 at 11:54:31AM +0200, David Hildenbrand (Arm) wrote: > On 7/29/26 18:48, Lorenzo Stoakes (ARM) wrote: > > In cases where we know that the VMA is file-backed, use > > vma_filebacked_address() rather than vma_address(). > > > > This lays the foundation for using the anonymous page offset via > > vma_anon_address(). > > I was briefly confused why we can't do that immediately. Because everything has to be switched on at once or it breaks things. Obviously you could use vma_anon_address() for pure anon but at that point you're only confusing things. This all stems from the existing situation where anon folios might be indexed by EITHER a file offset or an anon offset. In the end 'laying the foundations' makes the actual 'switch it on' patch (9/15) nice and (relatively) small :) > > > > > Also add an assert to ensure that the VMA whose address is required is not > > anonymous. > Acked-by: David Hildenbrand (Arm) <[email protected]> Thanks! > > -- > Cheers, > > David -- Cheers, Lorenzo