Hi, Here's v4 of the ring resizing support. For the v1 posting and details, look here: https://lore.kernel.org/io-uring/20241022021159.820925-1-axboe@xxxxxxxxx/T/#md3a2f049b0527592cc6d8ea25b46bde9fa8e5c68 include/linux/io_uring_types.h | 7 ++ include/uapi/linux/io_uring.h | 3 + io_uring/io_uring.c | 85 +++++++------ io_uring/io_uring.h | 6 + io_uring/memmap.c | 12 ++ io_uring/register.c | 215 +++++++++++++++++++++++++++++++++ 6 files changed, 290 insertions(+), 38 deletions(-) Changes since v3 - Add ctx->resize_lock, which is held across both mmap and ring resize operations. This prevents anyone else from running mmap at the same time as a resize, even if they are a different mm - Expand test cases to test the different mm situation -- Jens Axboe
