Commit 28fffa6c authored by Chuck Lever's avatar Chuck Lever
Browse files

SUNRPC: Expand the svc_alloc_arg_err tracepoint 



Record not only the number of pages requested, but the number of
pages that were actually allocated, to get a measure of progress
(or lack thereof).

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 184cefbe

include/trace/events/sunrpc.h

+9 −5
Original line number Diff line number Diff line
@@ -1989,20 +1989,24 @@ TRACE_EVENT(svc_wake_up, 


TRACE_EVENT(svc_alloc_arg_err,

	TP_PROTO(

		unsigned int pages

		unsigned int requested,

		unsigned int allocated

	),



	TP_ARGS(pages),

	TP_ARGS(requested, allocated),



	TP_STRUCT__entry(

		__field(unsigned int, pages)

		__field(unsigned int, requested)

		__field(unsigned int, allocated)

	),



	TP_fast_assign(

		__entry->pages = pages;

		__entry->requested = requested;

		__entry->allocated = allocated;

	),



	TP_printk("pages=%u", __entry->pages)

	TP_printk("requested=%u allocated=%u",

		__entry->requested, __entry->allocated)

);



DECLARE_EVENT_CLASS(svc_deferred_event,

net/sunrpc/svc_xprt.c

+1 −1
Original line number Diff line number Diff line
@@ -691,7 +691,7 @@ static int svc_alloc_arg(struct svc_rqst *rqstp) 
			set_current_state(TASK_RUNNING);

			return -EINTR;

		}

		trace_svc_alloc_arg_err(pages);

		trace_svc_alloc_arg_err(pages, ret);

		memalloc_retry_wait(GFP_KERNEL);

	}

	rqstp->rq_page_end = &rqstp->rq_pages[pages];