Hi, This series switches both the ring, sqes, and kbuf side away from using remap_pfn_range(). It's a v2 of the one posted here: https://lore.kernel.org/io-uring/20240321144831.58602-1-axboe@xxxxxxxxx/ and includes the ring/sqes side as well as the first few patches, with the idea being that we could move those to stable as well to solve the problem of fragmented memory in production systems not being able to initialize bigger rings. This series has been co-developed with Pavel Begunkov. Patch 1 is just a prep patch, and patches 2-3 add ring support, and patch 4 just unifies some identical code. Patches 5-7 cleanup some kbuf side code, and patch 8 prepares buffer lists to be reference counted, and then patch 9 can finally switch kbuf to also use the nicer vm_insert_pages(). With this, no more remap_pfn_range(), and no more manual cleanup of having used it. include/linux/io_uring_types.h | 4 - io_uring/io_uring.c | 261 +++++++++++++++++++---------- io_uring/io_uring.h | 8 +- io_uring/kbuf.c | 290 ++++++++++----------------------- io_uring/kbuf.h | 11 +- io_uring/rsrc.c | 36 ---- mm/nommu.c | 7 + 7 files changed, 277 insertions(+), 340 deletions(-) -- Jens Axboe
