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From: fengchengwen <fengchengwen@huawei.com>
To: <thomas@monjalon.net>, <dev@dpdk.org>,
	"Richardson, Bruce" <bruce.richardson@intel.com>
Cc: <anatoly.burakov@intel.com>, <jerinj@marvell.com>
Subject: Re: [PATCH] eal: fix segment fault when exit trace
Date: Tue, 7 Jun 2022 20:26:08 +0800	[thread overview]
Message-ID: <0b9f04f5-6944-85e6-4c91-566476601368@huawei.com> (raw)
In-Reply-To: <20220607120014.49823-1-fengchengwen@huawei.com>

Hi Bruce,

  Could you please test freebsd platform? I think it also have
the same problem, but I hasn't freebsd enviorment.

Thanks

On 2022/6/7 20:00, Chengwen Feng wrote:
> Bug scenario:
> 1. start testpmd:
> 	dpdk-testpmd -l 4-6 -a 0000:7d:00.0 --trace=.* -- -i
> 2. quit testpmd and then observed segment fault:
> 	Bye...
> 	Segmentation fault (core dumped)
> 
> The root cause is that rte_trace_save() and eal_trace_fini() access
> the huge pages which were cleanup by rte_eal_memory_detach().
> 
> This patch moves rte_trace_save() and eal_trace_fini() before
> rte_eal_memory_detach() to fix the bug.
> 
> Fixes: dfbc61a2f9a6 ("mem: detach memsegs on cleanup")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
> ---
>  lib/eal/linux/eal.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/eal/linux/eal.c b/lib/eal/linux/eal.c
> index 1ef263434a..c6f2056197 100644
> --- a/lib/eal/linux/eal.c
> +++ b/lib/eal/linux/eal.c
> @@ -1266,13 +1266,13 @@ rte_eal_cleanup(void)
>  	vfio_mp_sync_cleanup();
>  #endif
>  	rte_mp_channel_cleanup();
> +	rte_trace_save();
> +	eal_trace_fini();
>  	/* after this point, any DPDK pointers will become dangling */
>  	rte_eal_memory_detach();
>  	eal_mp_dev_hotplug_cleanup();
>  	rte_eal_malloc_heap_cleanup();
>  	rte_eal_alarm_cleanup();
> -	rte_trace_save();
> -	eal_trace_fini();
>  	eal_cleanup_config(internal_conf);
>  	rte_eal_log_cleanup();
>  	return 0;
> 


  reply	other threads:[~2022-06-07 12:26 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-07 12:00 Chengwen Feng
2022-06-07 12:26 ` fengchengwen [this message]
2022-06-13 14:15   ` David Marchand
2022-06-14  0:33     ` fengchengwen
2022-06-07 13:00 ` David Marchand
2022-06-08 10:31 ` Jerin Jacob
2022-06-14  5:58 ` [PATCH v2 0/3] bugfix for trace Chengwen Feng
2022-06-14  5:58   ` [PATCH v2 1/3] eal: fix segment fault when exit trace Chengwen Feng
2022-06-14  8:25     ` David Marchand
2022-06-14  5:58   ` [PATCH v2 2/3] eal: fix trace init fail with long file-prefix Chengwen Feng
2022-06-15 14:02     ` David Marchand
2022-06-15 18:11       ` Jerin Jacob
2022-06-14  5:59   ` [PATCH v2 3/3] test: support trace-autotest when enable trace Chengwen Feng
2022-06-15 14:00     ` David Marchand
2022-06-17  2:42       ` fengchengwen
2022-06-21  9:06         ` David Marchand
2022-06-17  2:29 ` [PATCH v3 0/4] bugfix for trace Chengwen Feng
2022-06-17  2:29   ` [PATCH v3 1/4] eal: fix segment fault when exit trace Chengwen Feng
2022-06-17  2:29   ` [PATCH v3 2/4] eal: fix errno not set if strftime return zero Chengwen Feng
2022-06-21  9:05     ` David Marchand
2022-06-17  2:29   ` [PATCH v3 3/4] eal: fix trace init fail with long file-prefix Chengwen Feng
2022-06-17  2:29   ` [PATCH v3 4/4] test: introduce trace-autotest with traces enabled Chengwen Feng
2022-06-21  9:07     ` David Marchand
2022-06-21  9:07   ` [PATCH v3 0/4] bugfix for trace David Marchand

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