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 12i2Pdun 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000011, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Jan 08, 2025 at 11:02:57PM +0100, David Hildenbrand wrote: > On 08.01.25 22:55, Matthew Wilcox wrote: > > On Wed, Jan 08, 2025 at 10:12:36PM +0100, David Hildenbrand wrote: > > > On 08.01.25 21:54, Matthew Wilcox wrote: > > > > Not necessarily! We already do that (since 2022) for DAX (see > > > > 6a8e0596f004). rmap lets you find every place that a given range > > > > of a file is mapped into user address spaces; but that file might be a > > > > device file, and so it's not just pagecache but also (in this case) > > > > fb memory, and whatever else device drivers decide to mmap. > > > > > > Yes, that part I remember. > > > > > > I thought we would be passing in a page into rmap_wrprotect_file_page(), and > > > was wondering what we would do to "struct page" that won't be a folio in > > > there. > > > > > > Probably, because the "_page" in rmap_wrprotect_file_page() is misleading :) > > > > > > ... should it be "file_range" ? (but we also pass the pfn ... ) > > > > I don't think it's unprecedented for us to identify a page by its pfn. > > After all, the acronym stands for "page frame number". That said, for > > the one caller of this, it has the struct page and passes in the result > > from page_to_pfn(). So no harm in passing in the struct page directly. > > > > I would not like to see this function called "rmap_wrprotect_file_pfn". > > Files don't have pfns, so that's a bad name. > > Agreed. > > (it's too late in the evening for me to give any good suggestions :) ) Matthew pinged me on irc with mapping_wrprotect_page() :>) Am happy to do that, will respin in a bit anyway... > > -- > Cheers, > > David / dhildenb >