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9961a78594
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmY/YdYQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpnmVEADBq8QT9Oa3HTIONHwxjmGMOalr7PSrBP89 S6Inv/l+3xDlyolyLh1HIXUC84iS9Ihi2pNC3dZct4fNcpA99H0CFaHDGwZ5rVri MrFaubZAps1qSzeypqEq3zWGKVUoaYWaOKhuOjye5Ei2tKymbguhDKl1WiKibD21 E9qOYbhSUFdub/xtx9Rv4BS05QW5bHZ2Y/tTFqB8MY4JUsdb9g/deVZkyGUQYRSd 40mDallRldjQQTQ8iU4H6/ORdGIN/90aLPbmzMdFtQcymnmRyid3rOEwhwWYe4NO ljnI8m1SJQilZz1d5oHBXBB5QubVptY1JWxbk8GQCSmOU5wrCq+ARCJXUtBXwniJ K4VFsGm9MkZcc5vsIwIzvsrk8DODla6EVo/jyDy8iFceZcNWfVxdwa5NS67V/6QT macbF785XDsmA5E4UjslbZqU047w+A5N1yazcZWzMk0coJDeB8AtsA1/C2WZOm8p HVoiAzsqt81hvPItnjCyZluL/YW+BKeOTnq04QbpQKcJpZBzszO4ZLtuD+IXkE69 8ZZPGFPnPS4ZMQojKkwsBr+Yo65S18oBDkib36mr2lsdnoWTpGq47C7ScUDBbqGm iI7U8tYMnVVkQQHVVmGI4KOr5/4lxxp8398kqCaxfW3D5BQhbtUOF/OBjBHj1ZSV 9aZx87CyhA== =DwAV -----END PGP SIGNATURE----- Merge tag 'for-6.10/io_uring-20240511' of git://git.kernel.dk/linux Pull io_uring updates from Jens Axboe: - Greatly improve send zerocopy performance, by enabling coalescing of sent buffers. MSG_ZEROCOPY already does this with send(2) and sendmsg(2), but the io_uring side did not. In local testing, the crossover point for send zerocopy being faster is now around 3000 byte packets, and it performs better than the sync syscall variants as well. This feature relies on a shared branch with net-next, which was pulled into both branches. - Unification of how async preparation is done across opcodes. Previously, opcodes that required extra memory for async retry would allocate that as needed, using on-stack state until that was the case. If async retry was needed, the on-stack state was adjusted appropriately for a retry and then copied to the allocated memory. This led to some fragile and ugly code, particularly for read/write handling, and made storage retries more difficult than they needed to be. Allocate the memory upfront, as it's cheap from our pools, and use that state consistently both initially and also from the retry side. - Move away from using remap_pfn_range() for mapping the rings. This is really not the right interface to use and can cause lifetime issues or leaks. Additionally, it means the ring sq/cq arrays need to be physically contigious, which can cause problems in production with larger rings when services are restarted, as memory can be very fragmented at that point. Move to using vm_insert_page(s) for the ring sq/cq arrays, and apply the same treatment to mapped ring provided buffers. This also helps unify the code we have dealing with allocating and mapping memory. Hard to see in the diffstat as we're adding a few features as well, but this kills about ~400 lines of code from the codebase as well. - Add support for bundles for send/recv. When used with provided buffers, bundles support sending or receiving more than one buffer at the time, improving the efficiency by only needing to call into the networking stack once for multiple sends or receives. - Tweaks for our accept operations, supporting both a DONTWAIT flag for skipping poll arm and retry if we can, and a POLLFIRST flag that the application can use to skip the initial accept attempt and rely purely on poll for triggering the operation. Both of these have identical flags on the receive side already. - Make the task_work ctx locking unconditional. We had various code paths here that would do a mix of lock/trylock and set the task_work state to whether or not it was locked. All of that goes away, we lock it unconditionally and get rid of the state flag indicating whether it's locked or not. The state struct still exists as an empty type, can go away in the future. - Add support for specifying NOP completion values, allowing it to be used for error handling testing. - Use set/test bit for io-wq worker flags. Not strictly needed, but also doesn't hurt and helps silence a KCSAN warning. - Cleanups for io-wq locking and work assignments, closing a tiny race where cancelations would not be able to find the work item reliably. - Misc fixes, cleanups, and improvements * tag 'for-6.10/io_uring-20240511' of git://git.kernel.dk/linux: (97 commits) io_uring: support to inject result for NOP io_uring: fail NOP if non-zero op flags is passed in io_uring/net: add IORING_ACCEPT_POLL_FIRST flag io_uring/net: add IORING_ACCEPT_DONTWAIT flag io_uring/filetable: don't unnecessarily clear/reset bitmap io_uring/io-wq: Use set_bit() and test_bit() at worker->flags io_uring/msg_ring: cleanup posting to IOPOLL vs !IOPOLL ring io_uring: Require zeroed sqe->len on provided-buffers send io_uring/notif: disable LAZY_WAKE for linked notifs io_uring/net: fix sendzc lazy wake polling io_uring/msg_ring: reuse ctx->submitter_task read using READ_ONCE instead of re-reading it io_uring/rw: reinstate thread check for retries io_uring/notif: implement notification stacking io_uring/notif: simplify io_notif_flush() net: add callback for setting a ubuf_info to skb net: extend ubuf_info callback to ops structure io_uring/net: support bundles for recv io_uring/net: support bundles for send io_uring/kbuf: add helpers for getting/peeking multiple buffers io_uring/net: add provided buffer support for IORING_OP_SEND ... |
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