doc: update minimum supported kernel

  The DPDK project is only committed to supporting upstream kernel
versions that are still in support.
The 3.16 kernel has reached End Of Life (in June 2020).
The next LTS kernel is 4.19 and is supported until December 2024.

This does not change the existing policy that distribution kernels
that are older are still supported.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 doc/guides/linux_gsg/sys_reqs.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
  

03/03/2021 19:28, Stephen Hemminger:
> The DPDK project is only committed to supporting upstream kernel
> versions that are still in support.
> The 3.16 kernel has reached End Of Life (in June 2020).
> The next LTS kernel is 4.19 and is supported until December 2024.
> 
> This does not change the existing policy that distribution kernels
> that are older are still supported.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
>  **Required:**
>  
> -*   Kernel version >= 3.16
> +*   Kernel version >= 4.19

Acked-by: Thomas Monjalon <thomas@monjalon.net>
  

On 3/16/2021 10:59 AM, Thomas Monjalon wrote:
> 03/03/2021 19:28, Stephen Hemminger:
>> The DPDK project is only committed to supporting upstream kernel
>> versions that are still in support.
>> The 3.16 kernel has reached End Of Life (in June 2020).
>> The next LTS kernel is 4.19 and is supported until December 2024.
>>
>> This does not change the existing policy that distribution kernels
>> that are older are still supported.
>>
>> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
>> ---
>>   **Required:**
>>   
>> -*   Kernel version >= 3.16
>> +*   Kernel version >= 4.19
> 
> Acked-by: Thomas Monjalon <thomas@monjalon.net>
> 
> 

No objection, but I see 4.4 is the oldest LTS, and there are a few in the middle 
till 4.19 [1]. Is 4.19 selected specially?

And what about adding a note to say oldest LTS kernel version is supported?

[1] https://www.kernel.org/category/releases.html
  

16/03/2021 12:52, Ferruh Yigit:
> On 3/16/2021 10:59 AM, Thomas Monjalon wrote:
> > 03/03/2021 19:28, Stephen Hemminger:
> >> The DPDK project is only committed to supporting upstream kernel
> >> versions that are still in support.
> >> The 3.16 kernel has reached End Of Life (in June 2020).
> >> The next LTS kernel is 4.19 and is supported until December 2024.
> >>
> >> This does not change the existing policy that distribution kernels
> >> that are older are still supported.
> >>
> >> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> >> ---
> >>   **Required:**
> >>   
> >> -*   Kernel version >= 3.16
> >> +*   Kernel version >= 4.19
> > 
> > Acked-by: Thomas Monjalon <thomas@monjalon.net>
> 
> No objection, but I see 4.4 is the oldest LTS, and there are a few in the middle 
> till 4.19 [1]. Is 4.19 selected specially?
> 
> And what about adding a note to say oldest LTS kernel version is supported?
> 
> [1] https://www.kernel.org/category/releases.html

Thanks Ferruh, I did not check before giving my ack.
So I agree it should be 4.4.
  

On Tue, 16 Mar 2021 11:52:52 +0000
Ferruh Yigit <ferruh.yigit@intel.com> wrote:

> On 3/16/2021 10:59 AM, Thomas Monjalon wrote:
> > 03/03/2021 19:28, Stephen Hemminger:  
> >> The DPDK project is only committed to supporting upstream kernel
> >> versions that are still in support.
> >> The 3.16 kernel has reached End Of Life (in June 2020).
> >> The next LTS kernel is 4.19 and is supported until December 2024.
> >>
> >> This does not change the existing policy that distribution kernels
> >> that are older are still supported.
> >>
> >> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> >> ---
> >>   **Required:**
> >>   
> >> -*   Kernel version >= 3.16
> >> +*   Kernel version >= 4.19  
> > 
> > Acked-by: Thomas Monjalon <thomas@monjalon.net>
> > 
> >   
> 
> No objection, but I see 4.4 is the oldest LTS, and there are a few in the middle 
> till 4.19 [1]. Is 4.19 selected specially?

Agree should be 4.4, I miss read one of the huge spreadsheets of releases.
Wikipedia and kernel.org both say 4.4 is supported until Feb 2022.

So we need to support 4.4 through 22.02 release