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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
dwarf-regs.c 
// SPDX-License-Identifier: GPL-2.0
/*
 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
 *
 * Written by: Masami Hiramatsu <mhiramat@kernel.org>
 */

#include <util.h>
#include <debug.h>
#include <dwarf-regs.h>
#include <elf.h>
#include <linux/kernel.h>

#ifndef EM_AARCH64
#define EM_AARCH64	183  /* ARM 64 bit */
#endif

/* Define const char * {arch}_register_tbl[] */
#define DEFINE_DWARF_REGSTR_TABLE
#include "../arch/x86/include/dwarf-regs-table.h"
#include "../arch/arm/include/dwarf-regs-table.h"
#include "../arch/arm64/include/dwarf-regs-table.h"
#include "../arch/sh/include/dwarf-regs-table.h"
#include "../arch/powerpc/include/dwarf-regs-table.h"
#include "../arch/s390/include/dwarf-regs-table.h"
#include "../arch/sparc/include/dwarf-regs-table.h"
#include "../arch/xtensa/include/dwarf-regs-table.h"

#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)

/* Return architecture dependent register string (for kprobe-tracer) */
const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
{
	switch (machine) {
	case EM_NONE:	/* Generic arch - use host arch */
		return get_arch_regstr(n);
	case EM_386:
		return __get_dwarf_regstr(x86_32_regstr_tbl, n);
	case EM_X86_64:
		return __get_dwarf_regstr(x86_64_regstr_tbl, n);
	case EM_ARM:
		return __get_dwarf_regstr(arm_regstr_tbl, n);
	case EM_AARCH64:
		return __get_dwarf_regstr(aarch64_regstr_tbl, n);
	case EM_SH:
		return __get_dwarf_regstr(sh_regstr_tbl, n);
	case EM_S390:
		return __get_dwarf_regstr(s390_regstr_tbl, n);
	case EM_PPC:
	case EM_PPC64:
		return __get_dwarf_regstr(powerpc_regstr_tbl, n);
	case EM_SPARC:
	case EM_SPARCV9:
		return __get_dwarf_regstr(sparc_regstr_tbl, n);
	case EM_XTENSA:
		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
	default:
		pr_err("ELF MACHINE %x is not supported.\n", machine);
	}
	return NULL;
}
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