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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
jitdump.h 
/*
 * jitdump.h: jitted code info encapsulation file format
 *
 * Adapted from OProfile GPLv2 support jidump.h:
 * Copyright 2007 OProfile authors
 * Jens Wilke
 * Daniel Hansel
 * Copyright IBM Corporation 2007
 */
#ifndef JITDUMP_H
#define JITDUMP_H

#include <sys/time.h>
#include <time.h>
#include <stdint.h>

/* JiTD */
#define JITHEADER_MAGIC		0x4A695444
#define JITHEADER_MAGIC_SW	0x4454694A

#define PADDING_8ALIGNED(x) ((((x) + 7) & 7) ^ 7)
#define ALIGN_8(x) (((x) + 7) & (~7))

#define JITHEADER_VERSION 1

enum jitdump_flags_bits {
	JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT,
	JITDUMP_FLAGS_MAX_BIT,
};

#define JITDUMP_FLAGS_ARCH_TIMESTAMP	(1ULL << JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT)

#define JITDUMP_FLAGS_RESERVED (JITDUMP_FLAGS_MAX_BIT < 64 ? \
				(~((1ULL << JITDUMP_FLAGS_MAX_BIT) - 1)) : 0)

struct jitheader {
	uint32_t magic;		/* characters "jItD" */
	uint32_t version;	/* header version */
	uint32_t total_size;	/* total size of header */
	uint32_t elf_mach;	/* elf mach target */
	uint32_t pad1;		/* reserved */
	uint32_t pid;		/* JIT process id */
	uint64_t timestamp;	/* timestamp */
	uint64_t flags;		/* flags */
};

enum jit_record_type {
	JIT_CODE_LOAD		= 0,
        JIT_CODE_MOVE           = 1,
	JIT_CODE_DEBUG_INFO	= 2,
	JIT_CODE_CLOSE		= 3,
	JIT_CODE_UNWINDING_INFO	= 4,

	JIT_CODE_MAX,
};

/* record prefix (mandatory in each record) */
struct jr_prefix {
	uint32_t id;
	uint32_t total_size;
	uint64_t timestamp;
};

struct jr_code_load {
	struct jr_prefix p;

	uint32_t pid;
	uint32_t tid;
	uint64_t vma;
	uint64_t code_addr;
	uint64_t code_size;
	uint64_t code_index;
};

struct jr_code_close {
	struct jr_prefix p;
};

struct jr_code_move {
	struct jr_prefix p;

	uint32_t pid;
	uint32_t tid;
	uint64_t vma;
	uint64_t old_code_addr;
	uint64_t new_code_addr;
	uint64_t code_size;
	uint64_t code_index;
};

struct debug_entry {
	uint64_t addr;
	int lineno;	    /* source line number starting at 1 */
	int discrim;	    /* column discriminator, 0 is default */
	const char name[0]; /* null terminated filename, \xff\0 if same as previous entry */
};

struct jr_code_debug_info {
	struct jr_prefix p;

	uint64_t code_addr;
	uint64_t nr_entry;
	struct debug_entry entries[0];
};

struct jr_code_unwinding_info {
	struct jr_prefix p;

	uint64_t unwinding_size;
	uint64_t eh_frame_hdr_size;
	uint64_t mapped_size;
	const char unwinding_data[0];
};

union jr_entry {
        struct jr_code_debug_info info;
        struct jr_code_close close;
        struct jr_code_load load;
        struct jr_code_move move;
        struct jr_prefix prefix;
        struct jr_code_unwinding_info unwinding;
};

static inline struct debug_entry *
debug_entry_next(struct debug_entry *ent)
{
	void *a = ent + 1;
	size_t l = strlen(ent->name) + 1;
	return a + l;
}

static inline char *
debug_entry_file(struct debug_entry *ent)
{
	void *a = ent + 1;
	return a;
}

#endif /* !JITDUMP_H */
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