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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-07-12 23:52:39 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-25 03:41:06 +0300 |
| commit | eb4a299b2f95437af6183946c2a2e850621cefdb (patch) | |
| tree | 16bd25d7e2ca9aab186eae6e517425c4da8e9b96 /io_uring/notif.h | |
| parent | eb42cebb2cf24c48f60c32856a4bba93d42659c8 (diff) | |
| download | linux-eb4a299b2f95437af6183946c2a2e850621cefdb.tar.xz | |
io_uring: cache struct io_notif
kmalloc'ing struct io_notif is too expensive when done frequently, cache
them as many other resources in io_uring. Keep two list, the first one
is from where we're getting notifiers, it's protected by ->uring_lock.
The second is protected by ->completion_lock, to which we queue released
notifiers. Then we splice one list into another when needed.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9dec18f7fcbab9f4bd40b96e5ae158b119945230.1657643355.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/notif.h')
| -rw-r--r-- | io_uring/notif.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/io_uring/notif.h b/io_uring/notif.h index 3d7a1d242e17..b23c9c0515bb 100644 --- a/io_uring/notif.h +++ b/io_uring/notif.h @@ -5,6 +5,8 @@ #include <net/sock.h> #include <linux/nospec.h> +#define IO_NOTIF_SPLICE_BATCH 32 + struct io_notif { struct ubuf_info uarg; struct io_ring_ctx *ctx; @@ -13,6 +15,8 @@ struct io_notif { u64 tag; /* see struct io_notif_slot::seq */ u32 seq; + /* hook into ctx->notif_list and ctx->notif_list_locked */ + struct list_head cache_node; union { struct callback_head task_work; @@ -41,6 +45,7 @@ struct io_notif_slot { }; int io_notif_unregister(struct io_ring_ctx *ctx); +void io_notif_cache_purge(struct io_ring_ctx *ctx); struct io_notif *io_alloc_notif(struct io_ring_ctx *ctx, struct io_notif_slot *slot); |