On 2025/3/11 23:11, Matthew Wilcox wrote:
> On Tue, Mar 11, 2025 at 08:25:25PM +0800, Yunsheng Lin wrote:
>>> struct page {
>>> unsigned long flags;
>>> unsigned long memdesc;
>>
>> It seems there may be memory behind the above 'memdesc' with different size
>> and layout for different subsystem?
>
> Yes.
>
>> I am not sure if I understand the case of the same page might be handle in
>> two subsystems concurrently or a page is allocated in one subsystem and
>> then passed to be handled in other subsystem, for examlpe:
>> page_pool owned page is mmap'ed into user space through tcp zero copy,
>> see tcp_zerocopy_vm_insert_batch(), it seems the same page is handled in
>> both networking/page_pool and vm subsystem?
>
> It's not that arbitrary. I mean, you could read all the documentation
> I've written about this concept, listen to the talks I've given. But
> sure, you're a special fucking snowflake and deserve your own unique
> explanation.
If you don't like responding to the above question/comment, I would rather
you strip out them like the other question/comment or just ignore it:(
I am not sure how to interpret the comment, but I am sure it is not a kind
one, so CC 'Code of Conduct Committee' in case there is more coming.
>
>
