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List-Unsubscribe: On Thu, Jun 12, 2025 at 05:36:35PM +0200, David Hildenbrand wrote: > On 12.06.25 17:28, Lorenzo Stoakes wrote: > > On Wed, Jun 11, 2025 at 02:06:52PM +0200, David Hildenbrand wrote: > > > We setup the cache mode but ... don't forward the updated pgprot to > > > insert_pfn_pud(). > > > > > > Only a problem on x86-64 PAT when mapping PFNs using PUDs that > > > require a special cachemode. > > > > > > Fix it by using the proper pgprot where the cachemode was setup. > > > > > > Identified by code inspection. > > > > > > Fixes: 7b806d229ef1 ("mm: remove vmf_insert_pfn_xxx_prot() for huge page-table entries") Ha! I don't even remember doing that patch... hm did I introduce this -ignoring cache- thing? Sorry! :P > > > Cc: > > > Signed-off-by: David Hildenbrand > > > > Nice catch! > > > > Reviewed-by: Lorenzo Stoakes > > Thanks! What's your opinion on stable? Really hard to judge the impact ... I think it makes sense? This is currently incorrect so let's do the right thing and backport. I think as per Dan it's probably difficult to picture this causing a problem, but on principle I think this is correct, and I don't see any harm in backporting? > > -- > Cheers, > > David / dhildenb >