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io_uring: improve trace_io_uring_defer() trace point

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We don't have shadow requests anymore, so get rid of the shadow
argument. Add the user_data argument, as that's often useful to easily
match up requests, instead of having to look at request pointers.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-11-21 09:01:20 -07:00
parent 1b4a51b6d0
commit 915967f69c
2 changed files with 9 additions and 9 deletions
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2
fs/io_uring.c
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@ -2588,7 +2588,7 @@ static int io_req_defer(struct io_kiocb *req)
req->flags |= REQ_F_FREE_SQE;
req->submit.sqe = sqe_copy;
trace_io_uring_defer(ctx, req, false);
trace_io_uring_defer(ctx, req, req->user_data);
list_add_tail(&req->list, &ctx->defer_list);
spin_unlock_irq(&ctx->completion_lock);
return -EIOCBQUEUED;

16
include/trace/events/io_uring.h
View file

@ -163,35 +163,35 @@ TRACE_EVENT(io_uring_queue_async_work,
);
/**
* io_uring_defer_list - called before the io_uring work added into defer_list
* io_uring_defer - called when an io_uring request is deferred
*
* @ctx: pointer to a ring context structure
* @req: pointer to a deferred request
* @shadow: whether request is shadow or not
* @user_data: user data associated with the request
*
* Allows to track deferred requests, to get an insight about what requests are
* not started immediately.
*/
TRACE_EVENT(io_uring_defer,
TP_PROTO(void *ctx, void *req, bool shadow),
TP_PROTO(void *ctx, void *req, unsigned long long user_data),
TP_ARGS(ctx, req, shadow),
TP_ARGS(ctx, req, user_data),
TP_STRUCT__entry (
__field( void *, ctx )
__field( void *, req )
__field( bool, shadow )
__field( unsigned long long, data )
),
TP_fast_assign(
__entry->ctx = ctx;
__entry->req = req;
__entry->shadow = shadow;
__entry->data = user_data;
),
TP_printk("ring %p, request %p%s", __entry->ctx, __entry->req,
__entry->shadow ? ", shadow": "")
TP_printk("ring %p, request %p user_data %llu", __entry->ctx,
__entry->req, __entry->data)
);
/**