diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-11-04 11:59:46 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-11-21 15:38:31 +0100 |
| commit | 42385b02baad0df55474b7f36dc13e0d4ffd0cc0 (patch) | |
| tree | 4a03a31927cb0927c452e40b2a2d8741d023b1e8 /io_uring/notif.c | |
| parent | io_uring: move zc reporting from the hot path (diff) | |
| download | linux-42385b02baad0df55474b7f36dc13e0d4ffd0cc0.tar.xz linux-42385b02baad0df55474b7f36dc13e0d4ffd0cc0.zip | |
io_uring/net: move mm accounting to a slower path
We can also move mm accounting to the extended callbacks. It removes a
few cycles from the hot path including skipping one function call and
setting io_req_task_complete as a callback directly. For user backed I/O
it shouldn't make any difference taking into considering atomic mm
accounting and page pinning.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1062f270273ad11c1b7b45ec59a6a317533d5e64.1667557923.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/notif.c')
| -rw-r--r-- | io_uring/notif.c | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/io_uring/notif.c b/io_uring/notif.c index 9864bde3e2ef..c4bb793ebf0e 100644 --- a/io_uring/notif.c +++ b/io_uring/notif.c @@ -9,11 +9,14 @@ #include "notif.h" #include "rsrc.h" -static void __io_notif_complete_tw(struct io_kiocb *notif, bool *locked) +static void io_notif_complete_tw_ext(struct io_kiocb *notif, bool *locked) { struct io_notif_data *nd = io_notif_to_data(notif); struct io_ring_ctx *ctx = notif->ctx; + if (nd->zc_report && (nd->zc_copied || !nd->zc_used)) + notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED; + if (nd->account_pages && ctx->user) { __io_unaccount_mem(ctx->user, nd->account_pages); nd->account_pages = 0; @@ -21,16 +24,6 @@ static void __io_notif_complete_tw(struct io_kiocb *notif, bool *locked) io_req_task_complete(notif, locked); } -static void io_notif_complete_tw_ext(struct io_kiocb *notif, bool *locked) -{ - struct io_notif_data *nd = io_notif_to_data(notif); - - if (nd->zc_report && (nd->zc_copied || !nd->zc_used)) - notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED; - - __io_notif_complete_tw(notif, locked); -} - static void io_tx_ubuf_callback(struct sk_buff *skb, struct ubuf_info *uarg, bool success) { @@ -59,11 +52,14 @@ void io_notif_set_extended(struct io_kiocb *notif) { struct io_notif_data *nd = io_notif_to_data(notif); - nd->zc_report = false; - nd->zc_used = false; - nd->zc_copied = false; - notif->io_task_work.func = io_notif_complete_tw_ext; - io_notif_to_data(notif)->uarg.callback = io_tx_ubuf_callback_ext; + if (nd->uarg.callback != io_tx_ubuf_callback_ext) { + nd->account_pages = 0; + nd->zc_report = false; + nd->zc_used = false; + nd->zc_copied = false; + nd->uarg.callback = io_tx_ubuf_callback_ext; + notif->io_task_work.func = io_notif_complete_tw_ext; + } } struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx) @@ -81,10 +77,9 @@ struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx) notif->task = current; io_get_task_refs(1); notif->rsrc_node = NULL; - notif->io_task_work.func = __io_notif_complete_tw; + notif->io_task_work.func = io_req_task_complete; nd = io_notif_to_data(notif); - nd->account_pages = 0; nd->uarg.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN; nd->uarg.callback = io_tx_ubuf_callback; refcount_set(&nd->uarg.refcnt, 1); |