> How can I know whether scatter/gather is available or not?
> In another word, when it's available and when it's not?
> I do not intend to ask the behavior of gadget driver.
> I just wonder how I can confirm it in general.
The following applies for device features in general, not just
>> Why doesn't the kernel use two memory blocks whose size is
2048KB(i.e.*oder 9 *)
>> instead of one block *order 10 *(you see, there are still three free
blocks and
>> 2048KB*2=4096KB equivalent to the memory size of order 10)?
>
>Most parts of the kernel, when asking for very high-order
On Fri, 19 Jun 2020 14:56:20 +0800, åä¸é¾ sunshilong said:
> Why doesn't the kernel use two memory blocks whose size is 2048KB(i.e.*oder 9
> *)
> instead of one block *order 10 *(you see, there are still three free blocks
> and
> 2048KB*2=4096KB equivalent to the memory size of order 10)?
>> Why does "page allocation failure" occur whereas there are still
"58*4096kB
>> (C)"(*I think it indicates there are 58 order 10 memory could be used*)
>> could be used?
>>
>> Here is the related log:
>>
>> [ 2161.623563] : page allocation failure: order:10,
>>
On Thu, 18 Jun 2020 14:21:05 +0800, åä¸é¾ said:
> Why does "page allocation failure" occur whereas there are still "58*4096kB
> (C)"(*I think it indicates there are 58 order 10 memory could be used*)
> could be used?
>
> Here is the related log:
>
> [ 2161.623563] : page allocation
Hi,
Why does "page allocation failure" occur whereas there are still "58*4096kB
(C)"(*I think it indicates there are 58 order 10 memory could be used*)
could be used?
Here is the related log:
[ 2161.623563] : page allocation failure: order:10,
mode:0x2084020(GFP_ATOMIC|__GFP_COMP)
[
