patches for DPDK stable branches
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* [dpdk-stable] [PATCH] malloc: fix memory element size in case of padding
@ 2019-11-21 14:25 Xueming Li
  2019-11-21 15:14 ` Burakov, Anatoly
  0 siblings, 1 reply; 10+ messages in thread
From: Xueming Li @ 2019-11-21 14:25 UTC (permalink / raw)
  To: Anatoly Burakov; +Cc: Xueming Li, Asaf Penso, dev, stable

This patch fixes wrong inner memory element size when joining two
elements.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Xueming Li <xuemingl@mellanox.com>
---
 lib/librte_eal/common/malloc_elem.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/librte_eal/common/malloc_elem.c b/lib/librte_eal/common/malloc_elem.c
index afacb1813c..885d00424b 100644
--- a/lib/librte_eal/common/malloc_elem.c
+++ b/lib/librte_eal/common/malloc_elem.c
@@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct malloc_elem *elem2)
 	else
 		elem1->heap->last = elem1;
 	elem1->next = next;
+	if (elem1->pad) {
+		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1->pad);
+		inner->size = elem1->size - elem1->pad;
+	}
 }
 
 struct malloc_elem *
-- 
2.17.1


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [PATCH] malloc: fix memory element size in case of padding
  2019-11-21 14:25 [dpdk-stable] [PATCH] malloc: fix memory element size in case of padding Xueming Li
@ 2019-11-21 15:14 ` Burakov, Anatoly
  2019-11-25 23:24   ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
  2019-11-26 15:26   ` Thomas Monjalon
  0 siblings, 2 replies; 10+ messages in thread
From: Burakov, Anatoly @ 2019-11-21 15:14 UTC (permalink / raw)
  To: Xueming Li; +Cc: Asaf Penso, dev, stable

On 21-Nov-19 2:25 PM, Xueming Li wrote:
> This patch fixes wrong inner memory element size when joining two
> elements.
> 
> Fixes: af75078fece3 ("first public release")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> ---
>   lib/librte_eal/common/malloc_elem.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/lib/librte_eal/common/malloc_elem.c b/lib/librte_eal/common/malloc_elem.c
> index afacb1813c..885d00424b 100644
> --- a/lib/librte_eal/common/malloc_elem.c
> +++ b/lib/librte_eal/common/malloc_elem.c
> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct malloc_elem *elem2)
>   	else
>   		elem1->heap->last = elem1;
>   	elem1->next = next;
> +	if (elem1->pad) {
> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1->pad);
> +		inner->size = elem1->size - elem1->pad;
> +	}
>   }
>   
>   struct malloc_elem *
> 

Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>

-- 
Thanks,
Anatoly

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-21 15:14 ` Burakov, Anatoly
@ 2019-11-25 23:24   ` " Thomas Monjalon
  2019-11-26 12:57     ` Burakov, Anatoly
  2019-11-26 15:26   ` Thomas Monjalon
  1 sibling, 1 reply; 10+ messages in thread
From: Thomas Monjalon @ 2019-11-25 23:24 UTC (permalink / raw)
  To: Burakov, Anatoly, Xueming Li; +Cc: dev, Asaf Penso, stable, david.marchand

21/11/2019 16:14, Burakov, Anatoly:
> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> > This patch fixes wrong inner memory element size when joining two
> > elements.
> > 
> > Fixes: af75078fece3 ("first public release")
> > Cc: stable@dpdk.org
> > 
> > Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> > ---
> > --- a/lib/librte_eal/common/malloc_elem.c
> > +++ b/lib/librte_eal/common/malloc_elem.c
> > @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct malloc_elem *elem2)
> >   	else
> >   		elem1->heap->last = elem1;
> >   	elem1->next = next;
> > +	if (elem1->pad) {
> > +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1->pad);
> > +		inner->size = elem1->size - elem1->pad;
> > +	}
> >   }
> 
> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>

I don't understand this patch.
The variable inner is never used.
What am I missing?



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-25 23:24   ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
@ 2019-11-26 12:57     ` Burakov, Anatoly
  2019-11-26 13:30       ` Thomas Monjalon
  0 siblings, 1 reply; 10+ messages in thread
From: Burakov, Anatoly @ 2019-11-26 12:57 UTC (permalink / raw)
  To: Thomas Monjalon, Xueming Li; +Cc: dev, Asaf Penso, stable, david.marchand

On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
> 21/11/2019 16:14, Burakov, Anatoly:
>> On 21-Nov-19 2:25 PM, Xueming Li wrote:
>>> This patch fixes wrong inner memory element size when joining two
>>> elements.
>>>
>>> Fixes: af75078fece3 ("first public release")
>>> Cc: stable@dpdk.org
>>>
>>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
>>> ---
>>> --- a/lib/librte_eal/common/malloc_elem.c
>>> +++ b/lib/librte_eal/common/malloc_elem.c
>>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct malloc_elem *elem2)
>>>    	else
>>>    		elem1->heap->last = elem1;
>>>    	elem1->next = next;
>>> +	if (elem1->pad) {
>>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1->pad);
>>> +		inner->size = elem1->size - elem1->pad;
>>> +	}
>>>    }
>>
>> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
> 
> I don't understand this patch.
> The variable inner is never used.
> What am I missing?
> 

For padded elements, malloc element has two headers - the "outer" header 
with empty space after it, and the "inner" header, after which the user 
memory actually starts. This makes it so that, when joining elements, if 
the outer element had a pad, we also update the inner element size to match.

-- 
Thanks,
Anatoly

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-26 12:57     ` Burakov, Anatoly
@ 2019-11-26 13:30       ` Thomas Monjalon
  2019-11-26 13:39         ` Xueming(Steven) Li
  0 siblings, 1 reply; 10+ messages in thread
From: Thomas Monjalon @ 2019-11-26 13:30 UTC (permalink / raw)
  To: Burakov, Anatoly; +Cc: Xueming Li, dev, Asaf Penso, stable, david.marchand

26/11/2019 13:57, Burakov, Anatoly:
> On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
> > 21/11/2019 16:14, Burakov, Anatoly:
> >> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> >>> This patch fixes wrong inner memory element size when joining two
> >>> elements.
> >>>
> >>> Fixes: af75078fece3 ("first public release")
> >>> Cc: stable@dpdk.org
> >>>
> >>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> >>> ---
> >>> --- a/lib/librte_eal/common/malloc_elem.c
> >>> +++ b/lib/librte_eal/common/malloc_elem.c
> >>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct malloc_elem *elem2)
> >>>    	else
> >>>    		elem1->heap->last = elem1;
> >>>    	elem1->next = next;
> >>> +	if (elem1->pad) {
> >>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1->pad);
> >>> +		inner->size = elem1->size - elem1->pad;
> >>> +	}
> >>>    }
> >>
> >> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > 
> > I don't understand this patch.
> > The variable inner is never used.
> > What am I missing?
> > 
> 
> For padded elements, malloc element has two headers - the "outer" header 
> with empty space after it, and the "inner" header, after which the user 
> memory actually starts. This makes it so that, when joining elements, if 
> the outer element had a pad, we also update the inner element size to match.

Where the variable "inner" is used in this function?



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-26 13:30       ` Thomas Monjalon
@ 2019-11-26 13:39         ` Xueming(Steven) Li
  2019-11-26 13:45           ` Thomas Monjalon
  0 siblings, 1 reply; 10+ messages in thread
From: Xueming(Steven) Li @ 2019-11-26 13:39 UTC (permalink / raw)
  To: Thomas Monjalon, Burakov, Anatoly; +Cc: dev, Asaf Penso, stable, david.marchand



> -----Original Message-----
> From: Thomas Monjalon <thomas@monjalon.net>
> Sent: Tuesday, November 26, 2019 9:30 PM
> To: Burakov, Anatoly <anatoly.burakov@intel.com>
> Cc: Xueming(Steven) Li <xuemingl@mellanox.com>; dev@dpdk.org; Asaf
> Penso <asafp@mellanox.com>; stable@dpdk.org;
> david.marchand@redhat.com
> Subject: Re: [dpdk-dev] [PATCH] malloc: fix memory element size in case of
> padding
> 
> 26/11/2019 13:57, Burakov, Anatoly:
> > On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
> > > 21/11/2019 16:14, Burakov, Anatoly:
> > >> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> > >>> This patch fixes wrong inner memory element size when joining two
> > >>> elements.
> > >>>
> > >>> Fixes: af75078fece3 ("first public release")
> > >>> Cc: stable@dpdk.org
> > >>>
> > >>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> > >>> ---
> > >>> --- a/lib/librte_eal/common/malloc_elem.c
> > >>> +++ b/lib/librte_eal/common/malloc_elem.c
> > >>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct
> malloc_elem *elem2)
> > >>>    	else
> > >>>    		elem1->heap->last = elem1;
> > >>>    	elem1->next = next;
> > >>> +	if (elem1->pad) {
> > >>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1-
> >pad);
> > >>> +		inner->size = elem1->size - elem1->pad;
> > >>> +	}
> > >>>    }
> > >>
> > >> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > >
> > > I don't understand this patch.
> > > The variable inner is never used.
> > > What am I missing?
> > >
> >
> > For padded elements, malloc element has two headers - the "outer"
> > header with empty space after it, and the "inner" header, after which
> > the user memory actually starts. This makes it so that, when joining
> > elements, if the outer element had a pad, we also update the inner
> element size to match.
> 
> Where the variable "inner" is used in this function?
> 
Rte_realloc, inner size is used to copy data.

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-26 13:39         ` Xueming(Steven) Li
@ 2019-11-26 13:45           ` Thomas Monjalon
  2019-11-26 14:55             ` Burakov, Anatoly
  2019-11-26 15:01             ` Thomas Monjalon
  0 siblings, 2 replies; 10+ messages in thread
From: Thomas Monjalon @ 2019-11-26 13:45 UTC (permalink / raw)
  To: Xueming(Steven) Li
  Cc: Burakov, Anatoly, dev, Asaf Penso, stable, david.marchand

26/11/2019 14:39, Xueming(Steven) Li:
> 
> > -----Original Message-----
> > From: Thomas Monjalon <thomas@monjalon.net>
> > Sent: Tuesday, November 26, 2019 9:30 PM
> > To: Burakov, Anatoly <anatoly.burakov@intel.com>
> > Cc: Xueming(Steven) Li <xuemingl@mellanox.com>; dev@dpdk.org; Asaf
> > Penso <asafp@mellanox.com>; stable@dpdk.org;
> > david.marchand@redhat.com
> > Subject: Re: [dpdk-dev] [PATCH] malloc: fix memory element size in case of
> > padding
> > 
> > 26/11/2019 13:57, Burakov, Anatoly:
> > > On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
> > > > 21/11/2019 16:14, Burakov, Anatoly:
> > > >> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> > > >>> This patch fixes wrong inner memory element size when joining two
> > > >>> elements.
> > > >>>
> > > >>> Fixes: af75078fece3 ("first public release")
> > > >>> Cc: stable@dpdk.org
> > > >>>
> > > >>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> > > >>> ---
> > > >>> --- a/lib/librte_eal/common/malloc_elem.c
> > > >>> +++ b/lib/librte_eal/common/malloc_elem.c
> > > >>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct
> > malloc_elem *elem2)
> > > >>>    	else
> > > >>>    		elem1->heap->last = elem1;
> > > >>>    	elem1->next = next;
> > > >>> +	if (elem1->pad) {
> > > >>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1-
> > >pad);
> > > >>> +		inner->size = elem1->size - elem1->pad;
> > > >>> +	}
> > > >>>    }
> > > >>
> > > >> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > > >
> > > > I don't understand this patch.
> > > > The variable inner is never used.
> > > > What am I missing?
> > > >
> > >
> > > For padded elements, malloc element has two headers - the "outer"
> > > header with empty space after it, and the "inner" header, after which
> > > the user memory actually starts. This makes it so that, when joining
> > > elements, if the outer element had a pad, we also update the inner
> > element size to match.
> > 
> > Where the variable "inner" is used in this function?
> > 
> Rte_realloc, inner size is used to copy data.

I still don't get it. Am I missing half of the patch?
Please give explicit line number.



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-26 13:45           ` Thomas Monjalon
@ 2019-11-26 14:55             ` Burakov, Anatoly
  2019-11-26 15:01             ` Thomas Monjalon
  1 sibling, 0 replies; 10+ messages in thread
From: Burakov, Anatoly @ 2019-11-26 14:55 UTC (permalink / raw)
  To: Thomas Monjalon, Xueming(Steven) Li
  Cc: dev, Asaf Penso, stable, david.marchand

On 26-Nov-19 1:45 PM, Thomas Monjalon wrote:
> 26/11/2019 14:39, Xueming(Steven) Li:
>>
>>> -----Original Message-----
>>> From: Thomas Monjalon <thomas@monjalon.net>
>>> Sent: Tuesday, November 26, 2019 9:30 PM
>>> To: Burakov, Anatoly <anatoly.burakov@intel.com>
>>> Cc: Xueming(Steven) Li <xuemingl@mellanox.com>; dev@dpdk.org; Asaf
>>> Penso <asafp@mellanox.com>; stable@dpdk.org;
>>> david.marchand@redhat.com
>>> Subject: Re: [dpdk-dev] [PATCH] malloc: fix memory element size in case of
>>> padding
>>>
>>> 26/11/2019 13:57, Burakov, Anatoly:
>>>> On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
>>>>> 21/11/2019 16:14, Burakov, Anatoly:
>>>>>> On 21-Nov-19 2:25 PM, Xueming Li wrote:
>>>>>>> This patch fixes wrong inner memory element size when joining two
>>>>>>> elements.
>>>>>>>
>>>>>>> Fixes: af75078fece3 ("first public release")
>>>>>>> Cc: stable@dpdk.org
>>>>>>>
>>>>>>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
>>>>>>> ---
>>>>>>> --- a/lib/librte_eal/common/malloc_elem.c
>>>>>>> +++ b/lib/librte_eal/common/malloc_elem.c
>>>>>>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct
>>> malloc_elem *elem2)
>>>>>>>     	else
>>>>>>>     		elem1->heap->last = elem1;
>>>>>>>     	elem1->next = next;
>>>>>>> +	if (elem1->pad) {
>>>>>>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1-
>>>> pad);
>>>>>>> +		inner->size = elem1->size - elem1->pad;
>>>>>>> +	}
>>>>>>>     }
>>>>>>
>>>>>> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
>>>>>
>>>>> I don't understand this patch.
>>>>> The variable inner is never used.
>>>>> What am I missing?
>>>>>
>>>>
>>>> For padded elements, malloc element has two headers - the "outer"
>>>> header with empty space after it, and the "inner" header, after which
>>>> the user memory actually starts. This makes it so that, when joining
>>>> elements, if the outer element had a pad, we also update the inner
>>> element size to match.
>>>
>>> Where the variable "inner" is used in this function?

Right on the next line after it is created :)

-- 
Thanks,
Anatoly

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-26 13:45           ` Thomas Monjalon
  2019-11-26 14:55             ` Burakov, Anatoly
@ 2019-11-26 15:01             ` Thomas Monjalon
  1 sibling, 0 replies; 10+ messages in thread
From: Thomas Monjalon @ 2019-11-26 15:01 UTC (permalink / raw)
  To: Xueming(Steven) Li, Burakov, Anatoly
  Cc: dev, Asaf Penso, stable, david.marchand

26/11/2019 14:45, Thomas Monjalon:
> 26/11/2019 14:39, Xueming(Steven) Li:
> > 
> > > -----Original Message-----
> > > From: Thomas Monjalon <thomas@monjalon.net>
> > > Sent: Tuesday, November 26, 2019 9:30 PM
> > > To: Burakov, Anatoly <anatoly.burakov@intel.com>
> > > Cc: Xueming(Steven) Li <xuemingl@mellanox.com>; dev@dpdk.org; Asaf
> > > Penso <asafp@mellanox.com>; stable@dpdk.org;
> > > david.marchand@redhat.com
> > > Subject: Re: [dpdk-dev] [PATCH] malloc: fix memory element size in case of
> > > padding
> > > 
> > > 26/11/2019 13:57, Burakov, Anatoly:
> > > > On 25-Nov-19 11:24 PM, Thomas Monjalon wrote:
> > > > > 21/11/2019 16:14, Burakov, Anatoly:
> > > > >> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> > > > >>> This patch fixes wrong inner memory element size when joining two
> > > > >>> elements.
> > > > >>>
> > > > >>> Fixes: af75078fece3 ("first public release")
> > > > >>> Cc: stable@dpdk.org
> > > > >>>
> > > > >>> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> > > > >>> ---
> > > > >>> --- a/lib/librte_eal/common/malloc_elem.c
> > > > >>> +++ b/lib/librte_eal/common/malloc_elem.c
> > > > >>> @@ -487,6 +487,10 @@ join_elem(struct malloc_elem *elem1, struct
> > > malloc_elem *elem2)
> > > > >>>    	else
> > > > >>>    		elem1->heap->last = elem1;
> > > > >>>    	elem1->next = next;
> > > > >>> +	if (elem1->pad) {
> > > > >>> +		struct malloc_elem *inner = RTE_PTR_ADD(elem1, elem1-
> > > >pad);
> > > > >>> +		inner->size = elem1->size - elem1->pad;
> > > > >>> +	}
> > > > >>>    }
> > > > >>
> > > > >> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>
> > > > >
> > > > > I don't understand this patch.
> > > > > The variable inner is never used.
> > > > > What am I missing?
> > > > >
> > > >
> > > > For padded elements, malloc element has two headers - the "outer"
> > > > header with empty space after it, and the "inner" header, after which
> > > > the user memory actually starts. This makes it so that, when joining
> > > > elements, if the outer element had a pad, we also update the inner
> > > element size to match.
> > > 
> > > Where the variable "inner" is used in this function?
> > > 
> > Rte_realloc, inner size is used to copy data.
> 
> I still don't get it. Am I missing half of the patch?
> Please give explicit line number.

OK after a quick chat, I understood my miss:
inner is a pointer helping to reach the size field.
Sorry for the noise.



^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] malloc: fix memory element size in case of padding
  2019-11-21 15:14 ` Burakov, Anatoly
  2019-11-25 23:24   ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
@ 2019-11-26 15:26   ` Thomas Monjalon
  1 sibling, 0 replies; 10+ messages in thread
From: Thomas Monjalon @ 2019-11-26 15:26 UTC (permalink / raw)
  To: Xueming Li; +Cc: dev, Burakov, Anatoly, Asaf Penso, stable

21/11/2019 16:14, Burakov, Anatoly:
> On 21-Nov-19 2:25 PM, Xueming Li wrote:
> > This patch fixes wrong inner memory element size when joining two
> > elements.
> > 
> > Fixes: af75078fece3 ("first public release")
> > Cc: stable@dpdk.org
> > 
> > Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> 
> Reviewed-by: Anatoly Burakov <anatoly.burakov@intel.com>

Applied, thanks




^ permalink raw reply	[flat|nested] 10+ messages in thread

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Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-21 14:25 [dpdk-stable] [PATCH] malloc: fix memory element size in case of padding Xueming Li
2019-11-21 15:14 ` Burakov, Anatoly
2019-11-25 23:24   ` [dpdk-stable] [dpdk-dev] " Thomas Monjalon
2019-11-26 12:57     ` Burakov, Anatoly
2019-11-26 13:30       ` Thomas Monjalon
2019-11-26 13:39         ` Xueming(Steven) Li
2019-11-26 13:45           ` Thomas Monjalon
2019-11-26 14:55             ` Burakov, Anatoly
2019-11-26 15:01             ` Thomas Monjalon
2019-11-26 15:26   ` Thomas Monjalon

patches for DPDK stable branches

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