From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: dev@dpdk.org, Thomas Monjalon <thomas.monjalon@6wind.com>,
Remy Horton <remy.horton@intel.com>
Subject: Re: [dpdk-dev] [PATCH] ethdev: fix wrong memset
Date: Mon, 23 Jan 2017 11:05:25 +0000 [thread overview]
Message-ID: <53a23156-dcb9-b41f-c27c-5bd13d5874f6@intel.com> (raw)
In-Reply-To: <20170123103417.GB10293@yliu-dev.sh.intel.com>
On 1/23/2017 10:34 AM, Yuanhan Liu wrote:
> On Mon, Jan 23, 2017 at 09:41:35AM +0000, Ferruh Yigit wrote:
>> On 1/22/2017 2:45 AM, Yuanhan Liu wrote:
>>> On Fri, Jan 20, 2017 at 03:27:43PM +0000, Ferruh Yigit wrote:
>>>> On 1/20/2017 11:21 AM, Ferruh Yigit wrote:
>>>>> On 1/20/2017 8:04 AM, Yuanhan Liu wrote:
>>>>>> Fix an silly error by auto-complete while managing the merge conflicts.
>>>>>> It's the eth_dev_data (but not eth_dev) entry should be memset.
>>>>>>
>>>>>> Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple process model")
>>>>>>
>>>>>> Reported-by: Ferruh Yigit <ferruh.yigit@intel.com>
>>>>>> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
>>>>>> ---
>>>>>> lib/librte_ether/rte_ethdev.c | 2 +-
>>>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
>>>>>> index 4790faf..61f44e2 100644
>>>>>> --- a/lib/librte_ether/rte_ethdev.c
>>>>>> +++ b/lib/librte_ether/rte_ethdev.c
>>>>>> @@ -225,7 +225,7 @@ struct rte_eth_dev *
>>>>>> return NULL;
>>>>>> }
>>>>>>
>>>>>> - memset(&rte_eth_devices[port_id], 0, sizeof(*eth_dev->data));
>>>>>> + memset(&rte_eth_dev_data[port_id], 0, sizeof(struct rte_eth_dev_data));
>>>>>
>>>>> Not directly related to the this issue, but, after fix, this may have
>>>>> issues with secondary process.
>>>>>
>>>>> There were patches sent to fix this.
>>>>
>>>> I mean this one:
>>>> http://dpdk.org/ml/archives/dev/2017-January/054422.html
>>>
>>> d948f596fee2 ("ethdev: fix port data mismatched in multiple process
>>> model") should have fixed it.
>>
>> Think about case, where secondary process uses a virtual PMD, which does
>> a rte_eth_dev_allocate() call, shouldn't this corrupt primary process
>> device data?
>
> Yes, it may. However, I doubt that's the typical usage.
But this is a use case, and broken now, and fix is known. Should be
fixed I think.
> Besides that,
> most of virtual PMDs don't support Multipleprocess: git grep shows pcap
> is the only one that does claim Multipleprocess is supported.
I guess you searched for NIC feature documentation for this. But as far
as I know, all virtual drivers can be used in both primary and secondary
process.
>
> --yliu
>
next prev parent reply other threads:[~2017-01-23 11:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-20 8:04 Yuanhan Liu
2017-01-20 10:20 ` Thomas Monjalon
2017-01-20 10:34 ` Yuanhan Liu
2017-01-20 11:09 ` Ferruh Yigit
2017-01-20 18:05 ` Thomas Monjalon
2017-01-20 11:21 ` Ferruh Yigit
2017-01-20 15:27 ` Ferruh Yigit
2017-01-22 2:45 ` Yuanhan Liu
2017-01-23 9:41 ` Ferruh Yigit
2017-01-23 10:34 ` Yuanhan Liu
2017-01-23 11:05 ` Ferruh Yigit [this message]
2017-01-23 11:24 ` Yuanhan Liu
2017-01-23 11:32 ` Ferruh Yigit
2017-01-23 11:40 ` Yuanhan Liu
2017-01-23 11:56 ` Yuanhan Liu
2017-01-23 12:44 ` Ananyev, Konstantin
2017-01-23 12:52 ` Yuanhan Liu
2017-01-23 13:06 ` Ananyev, Konstantin
2017-01-23 13:09 ` Ferruh Yigit
2017-01-25 11:16 ` Thomas Monjalon
2017-01-28 13:14 ` Yuanhan Liu
2017-01-30 11:07 ` Remy Horton
2017-01-24 8:29 ` Remy Horton
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