On Tue 12-11-24 17:08:34, Mohammed Anees wrote:
> The comment suggests a hash or array approach to
> store the active requests. Currently it iterates
> through all the active requests and when found
> deletes the requested request, in the linked list.
> However io_cancel() isn’t a frequently used operation,
> and optimizing it wouldn’t bring a substantial benefit
> to real users and the increased complexity of maintaining
> a hashtable for this would be significant and will slow
> down other operation. Therefore remove this TODO
> to avoid people spending time improving this.
>
> Signed-off-by: Mohammed Anees <pvmohammedanees2003@xxxxxxxxx>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/aio.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/fs/aio.c b/fs/aio.c
> index e8920178b50f..72e3970f4225 100644
> --- a/fs/aio.c
> +++ b/fs/aio.c
> @@ -2191,7 +2191,6 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
> return -EINVAL;
>
> spin_lock_irq(&ctx->ctx_lock);
> - /* TODO: use a hash or array, this sucks. */
> list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) {
> if (kiocb->ki_res.obj == obj) {
> ret = kiocb->ki_cancel(&kiocb->rw);
> --
> 2.47.0
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
