On Tue, Dec 20, 2022 at 08:13:14PM +0000, Eric Biggers wrote: > On Tue, Dec 20, 2022 at 05:17:52PM +0000, Christophe Leroy wrote: > > Hi Jason, > > > > Le 12/12/2022 à 19:53, Jason A. Donenfeld a écrit : > > > Changes v11->v12: > > > ---------------- > > > - In order to avoid mlock()ing pages, and the related rlimit and fork > > > inheritance issues there, Introduce VM_DROPPABLE to prevent swapping > > > while meeting the cache-like requirements of vDSO getrandom(). > > > > > > This has some tenticles in mm/ and arch/x86/ code, so I've marked the > > > two patches for that as still RFC, while the rest of the series is not > > > RFC. > > > > > > - Mandate that opaque state blobs don't straddle page boundaries, so > > > that VM_DROPPABLE can work on page-level granularity rather than > > > allocation-level granularity. > > > > > > - Add compiler barriers to vDSO getrandom() to prevent theoretical > > > reordering potential. > > > > > > - Initialize the trials loop counter in the chacha test. > > > > I would have liked to give it a try on powerpc, but the series > > conflicts. I tried both on v6.1 and on linus/master from now: > > > > Same here, I can't figure out how to apply this series. Rebased v13 posted: https://lore.kernel.org/all/20221221142327.126451-1-Jason@xxxxxxxxx/ Jason
