Mao Wenan b43d1f9f70 af_packet: set defaule value for tmo ... There is softlockup when using TPACKET_V3: ... NMI watchdog: BUG: soft lockup - CPU#2 stuck for 60010ms! (__irq_svc) from [<c0558a0c>] (_raw_spin_unlock_irqrestore+0x44/0x54) (_raw_spin_unlock_irqrestore) from [<c027b7e8>] (mod_timer+0x210/0x25c) (mod_timer) from [<c0549c30>] (prb_retire_rx_blk_timer_expired+0x68/0x11c) (prb_retire_rx_blk_timer_expired) from [<c027a7ac>] (call_timer_fn+0x90/0x17c) (call_timer_fn) from [<c027ab6c>] (run_timer_softirq+0x2d4/0x2fc) (run_timer_softirq) from [<c021eaf4>] (__do_softirq+0x218/0x318) (__do_softirq) from [<c021eea0>] (irq_exit+0x88/0xac) (irq_exit) from [<c0240130>] (msa_irq_exit+0x11c/0x1d4) (msa_irq_exit) from [<c0209cf0>] (handle_IPI+0x650/0x7f4) (handle_IPI) from [<c02015bc>] (gic_handle_irq+0x108/0x118) (gic_handle_irq) from [<c0558ee4>] (__irq_usr+0x44/0x5c) ... If __ethtool_get_link_ksettings() is failed in prb_calc_retire_blk_tmo(), msec and tmo will be zero, so tov_in_jiffies is zero and the timer expire for retire_blk_timer is turn to mod_timer(&pkc->retire_blk_timer, jiffies + 0), which will trigger cpu usage of softirq is 100%. Fixes: f6fb8f100b ("af-packet: TPACKET_V3 flexible buffer implementation.") Tested-by: Xiao Jiangfeng <xiaojiangfeng@huawei.com> Signed-off-by: Mao Wenan <maowenan@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2019-12-09 14:30:19 -08:00
..
af_packet.c	af_packet: set defaule value for tmo	2019-12-09 14:30:19 -08:00
diag.c	treewide: Add SPDX license identifier for more missed files	2019-05-21 10:50:45 +02:00
internal.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2019-06-27 21:06:39 -07:00
Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00