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
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
crypto_wq.c
/*
* Workqueue for crypto subsystem
*
* Copyright (c) 2009 Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <linux/workqueue.h>
#include <linux/module.h>
#include <crypto/algapi.h>
#include <crypto/crypto_wq.h>
struct workqueue_struct *kcrypto_wq;
EXPORT_SYMBOL_GPL(kcrypto_wq);
static int __init crypto_wq_init(void)
{
kcrypto_wq = alloc_workqueue("crypto",
WQ_MEM_RECLAIM | WQ_CPU_INTENSIVE, 1);
if (unlikely(!kcrypto_wq))
return -ENOMEM;
return 0;
}
static void __exit crypto_wq_exit(void)
{
destroy_workqueue(kcrypto_wq);
}
subsys_initcall(crypto_wq_init);
module_exit(crypto_wq_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Workqueue for crypto subsystem");
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...