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io_uring/kbuf: remove legacy kbuf kmem cache

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Remove the kmem cache used by legacy provided buffers.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8195c207d8524d94e972c0c82de99282289f7f5c.1738724373.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2025-02-05 11:36:43 +00:00 • committed by Jens Axboe
parent 7919292a96
commit 9afe6847cf
3 changed files with 2 additions and 7 deletions
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2
io_uring/io_uring.c
View file

@ -3927,8 +3927,6 @@ static int __init io_uring_init(void)
req_cachep = kmem_cache_create("io_kiocb", sizeof(struct io_kiocb), &kmem_args,
SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT |
SLAB_TYPESAFE_BY_RCU);
io_buf_cachep = KMEM_CACHE(io_buffer,
SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
iou_wq = alloc_workqueue("iou_exit", WQ_UNBOUND, 64);
BUG_ON(!iou_wq);

1
io_uring/io_uring.h
View file

@ -418,7 +418,6 @@ static inline bool io_req_cache_empty(struct io_ring_ctx *ctx)
}
extern struct kmem_cache *req_cachep;
extern struct kmem_cache *io_buf_cachep;
static inline struct io_kiocb *io_extract_req(struct io_ring_ctx *ctx)
{

6
io_uring/kbuf.c
View file

@ -20,8 +20,6 @@
/* BIDs are addressed by a 16-bit field in a CQE */
#define MAX_BIDS_PER_BGID (1 << 16)
struct kmem_cache *io_buf_cachep;
struct io_provide_buf {
struct file *file;
__u64 addr;
@ -411,7 +409,7 @@ void io_destroy_buffers(struct io_ring_ctx *ctx)
list_for_each_safe(item, tmp, &ctx->io_buffers_cache) {
buf = list_entry(item, struct io_buffer, list);
kmem_cache_free(io_buf_cachep, buf);
kfree(buf);
}
}
@ -521,7 +519,7 @@ static int io_refill_buffer_cache(struct io_ring_ctx *ctx)
spin_unlock(&ctx->completion_lock);
}
buf = kmem_cache_alloc(io_buf_cachep, GFP_KERNEL);
buf = kmalloc(sizeof(*buf), GFP_KERNEL_ACCOUNT);
if (!buf)
return -ENOMEM;
list_add_tail(&buf->list, &ctx->io_buffers_cache);