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path: root/include/trace/events/napi.h
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#undef TRACE_SYSTEM
#define TRACE_SYSTEM napi

#if !defined(_TRACE_NAPI_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_NAPI_H_

#include <linux/netdevice.h>
#include <linux/tracepoint.h>
#include <linux/ftrace.h>

#define NO_DEV "(no_device)"

TRACE_EVENT(napi_poll,

	TP_PROTO(struct napi_struct *napi, int work, int budget),

	TP_ARGS(napi, work, budget),

	TP_STRUCT__entry(
		__field(	struct napi_struct *,	napi)
		__string(	dev_name, napi->dev ? napi->dev->name : NO_DEV)
		__field(	int,			work)
		__field(	int,			budget)
	),

	TP_fast_assign(
		__entry->napi = napi;
		__assign_str(dev_name, napi->dev ? napi->dev->name : NO_DEV);
		__entry->work = work;
		__entry->budget = budget;
	),

	TP_printk("napi poll on napi struct %p for device %s work %d budget %d",
		  __entry->napi, __get_str(dev_name),
		  __entry->work, __entry->budget)
);

#undef NO_DEV

#endif /* _TRACE_NAPI_H_ */

/* This part must be outside protection */
#include <trace/define_trace.h>
f2ce6'>diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/dt-bindings/mfd/dbx500-prcmu.h')