On 24.11.21 14:28, Jason Gunthorpe wrote: > On Wed, Nov 24, 2021 at 02:25:09PM +0100, David Hildenbrand wrote: >> On 24.11.21 14:23, Jason Gunthorpe wrote: >>> On Wed, Nov 24, 2021 at 09:57:32AM +0100, David Hildenbrand wrote: >>> >>>> Unfortunately it will only be a band aid AFAIU. I can rewrite my >>>> reproducer fairly easily to pin the whole 2M range first, pin a second >>>> time only a single page, and then unpin the 2M range, resulting in the >>>> very same way to block THP. (I can block some THP less because I always >>>> need the possibility to memlock 2M first, though). >>> >>> Oh! >>> >>> The issue is GUP always pins an entire compound, no matter how little >>> the user requests. >> >> That's a different issue. I make sure to split the compound page before >> pinning anything :) > > ?? Where is that done in GUP? It's done in my reproducer manually. -- Thanks, David / dhildenb
