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Revision 9c29bcd189f4ab1644b7125713602532d0aefdb7 authored by Eric Dumazet on 21 September 2018, 22:27:48 UTC, committed by David S. Miller on 24 September 2018, 04:55:25 UTC 
mlx5: remove ndo_poll_controller
 
As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

mlx5 uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent a24b66c
Raw File
tsc.h 
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_TSC_H
#define __PERF_TSC_H

#include <linux/types.h>

#include "event.h"

struct perf_tsc_conversion {
	u16 time_shift;
	u32 time_mult;
	u64 time_zero;
};
struct perf_event_mmap_page;

int perf_read_tsc_conversion(const struct perf_event_mmap_page *pc,
			     struct perf_tsc_conversion *tc);

u64 perf_time_to_tsc(u64 ns, struct perf_tsc_conversion *tc);
u64 tsc_to_perf_time(u64 cyc, struct perf_tsc_conversion *tc);
u64 rdtsc(void);

struct perf_event_mmap_page;
struct perf_tool;
struct machine;

int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc,
				struct perf_tool *tool,
				perf_event__handler_t process,
				struct machine *machine);

#endif
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