On Wed, Sep 29, 2021 at 03:50:02PM -0600, Logan Gunthorpe wrote: > > > On 2021-09-28 2:02 p.m., Jason Gunthorpe wrote: > > On Thu, Sep 16, 2021 at 05:40:40PM -0600, Logan Gunthorpe wrote: > >> Hi, > >> > >> This patchset continues my work to add userspace P2PDMA access using > >> O_DIRECT NVMe devices. My last posting[1] just included the first 13 > >> patches in this series, but the early P2PDMA cleanup and map_sg error > >> changes from that series have been merged into v5.15-rc1. To address > >> concerns that that series did not add any new functionality, I've added > >> back the userspcae functionality from the original RFC[2] (but improved > >> based on the original feedback). > > > > I really think this is the best series yet, it really looks nice > > overall. I know the sg flag was a bit of a debate at the start, but it > > serves an undeniable purpose and the resulting standard DMA APIs 'just > > working' is really clean. > > Actually, so far, nobody has said anything negative about using the SG flag. > > > There is more possible here, we could also pass the new GUP flag in the > > ib_umem code.. > > Yes, that would be very useful. You might actually prefer to do that then the bio changes to get the infrastructur merged as it seems less "core" Jason
