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2023-04-04io_uring: don't put nodes under spinlocksPavel Begunkov
io_req_put_rsrc() doesn't need any locking, so move it out of a spinlock section in __io_req_complete_post() and adjust helpers. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d5b87a5f31270dade6805f7acafc4cc34b84b241.1680576071.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-04-04io_uring/rsrc: keep cached refs per nodePavel Begunkov
We cache refs of the current node (i.e. ctx->rsrc_node) in ctx->rsrc_cached_refs. We'll be moving away from atomics, so move the cached refs in struct io_rsrc_node for now. It's a prep patch and shouldn't change anything in practise. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/9edc3669c1d71b06c2dca78b2b2b8bb9292738b9.1680576071.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-04-04io_uring/rsrc: use non-pcpu refcounts for nodesPavel Begunkov
One problem with the current rsrc infra is that often updates will generates lots of rsrc nodes, each carry pcpu refs. That takes quite a lot of memory, especially if there is a stall, and takes lots of CPU cycles. Only pcpu allocations takes >50 of CPU with a naive benchmark updating files in a loop. Replace pcpu refs with normal refcounting. There is already a hot path avoiding atomics / refs, but following patches will further improve it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/e9ed8a9457b331a26555ff9443afc64cdaab7247.1680576071.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-03-29io_uring/rsrc: fix rogue rsrc node grabbingPavel Begunkov
We should not be looking at ctx->rsrc_node and anyhow modifying the node without holding uring_lock, grabbing references in such a way is not safe either. Cc: stable@vger.kernel.org Fixes: 5106dd6e74ab6 ("io_uring: propagate issue_flags state down to file assignment") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/1202ede2d7bb90136e3482b2b84aad9ed483e5d6.1680098433.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-12-07io_uring: use tw for putting rsrcPavel Begunkov
Use task_work for completing rsrc removals, it'll be needed later for spinlock optimisations. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/cbba5d53a11ee6fc2194dacea262c1d733c8b529.1670384893.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-10-16io_uring: remove FFS_SCMPavel Begunkov
THe lifetime of SCM'ed files is bound to ring_sock, which is destroyed strictly after we're done with registered file tables. This means there is no need for the FFS_SCM hack, which was not available on 32-bit builds anyway. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/984226a1045adf42dc35d8bd7fb5a8bbfa472ce1.1665891182.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-01Revert "io_uring: rename IORING_OP_FILES_UPDATE"Pavel Begunkov
This reverts commit 4379d5f15b3fd4224c37841029178aa8082a242e. We removed notification flushing, also cleanup uapi preparation changes to not pollute it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/89edc3905350f91e1b6e26d9dbf42ee44fd451a2.1662027856.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-25io_uring/net: make page accounting more consistentPavel Begunkov
Make network page accounting more consistent with how buffer registration is working, i.e. account all memory to ctx->user. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/4aacfe64bbb81b27f9ecf5d5c219c69a07e5aa56.1658742118.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-24io_uring: rename IORING_OP_FILES_UPDATEPavel Begunkov
IORING_OP_FILES_UPDATE will be a more generic opcode serving different resource types, rename it into IORING_OP_RSRC_UPDATE and add subtype handling. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/0a907133907d9af3415a8a7aa1802c6aa97c03c6.1657643355.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-24io_uring: add rsrc referencing for notifiersPavel Begunkov
In preparation to zerocopy sends with fixed buffers make notifiers to reference the rsrc node to protect the used fixed buffers. We can't just grab it for a send request as notifiers can likely outlive requests that used it. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/3cd7a01d26837945b6982fa9cf15a63230f2ed4f.1657643355.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-24io_uring: move io_import_fixed()Pavel Begunkov
Move io_import_fixed() into rsrc.c where it belongs. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/4d5becb21f332b4fef6a7cedd6a50e65e2371630.1655684496.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-24io_uring: move a few private types to local headersJens Axboe
Commit 3a3d47fa9cfd ("io_uring: make io_uring_types.h public") moved a bunch of io_uring types to a kernel wide header, so we could make tracing a bit saner rather than pass in a ton of arguments. However, there are a few types in there that are not really needed to be system wide. Move the cancel data and mapped buffers back to the appropriate io_uring local headers. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-07-24io_uring: move rsrc related data, core, and commandsJens Axboe
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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