a sufficiently large
buffer which is greater than 256 KB (128(CURRENT_IO_TLB_SEGMENT *
2048) and need to
adjust this parameter during boot time, not compilation time.
In order to this point, this patch was created.
Thanks,
Roman
пт, 17 сент. 2021 г. в 12:44, Robin Murphy :
>
> On 2021-09-17 10
> extra replacement, nor would a test build (with both patches in
> place).
It's reasonable.
I will change the original IO_TLB_SEGSIZE to IO_TLB_DEFAULT_SEGSIZE in the
next patch series.
Thanks.
ср, 15 сент. 2021 г. в 16:50, Jan Beulich :
>
> On 15.09.2021 15:37, Roman
Hi, Christoph
I use Xen PV display. In my case, PV display backend(Dom0) allocates
contiguous buffer via DMA-API to
to implement zero-copy between Dom0 and DomU.
When I start Weston under DomU, I got the next log in Dom0:
```
[ 112.554471] CPU: 0 PID: 367 Comm: weston Tainted: G O
5.10.0-yocto-st
Hi Stefano,
> Also, Option 1 listed in the webpage seems to be a lot better. Any
> reason you can't do that? Because that option both solves the problem
> and increases performance.
Yes, Option 1 is probably more efficient.
But I use another platform under Xen without DMA adjustment functionality
Hi Jan,
Thanks for the answer.
>> From: Roman Skakun
>>
>> It is possible when default IO TLB size is not
>> enough to fit a long buffers as described here [1].
>>
>> This patch makes a way to set this parameter
>> using cmdline instead of recompiling
From: Roman Skakun
It is possible when default IO TLB size is not
enough to fit a long buffers as described here [1].
This patch makes a way to set this parameter
using cmdline instead of recompiling a kernel.
[1] https://www.xilinx.com/support/answers/72694.html
Signed-off-by: Roman Skakun
