Re: [lc-devel] Chunk list issues

[Nitin G. <nit...@gm...>]

Hi Mauricio,

Mauricio Lin wrote:
> Regarding the master chunk list (chunks) in the struct chunk, does it
> store the chunks of one page cache or several page caches? Will be
> there one master chunk list per page cache radix tree?

'master chunk list' is list of all chunks -- these chunks may be part of a file, 
part of anon page, or free chunks. Its there to easily merge physically adjacent 
chunks when a chunk is freed.

> 
> I also wonder where the chunk list header will be stored. For instance
> the list header of task_struct is stored in the tasks field of
> init_task, so when an insertion happens in the list of task_struct,
> something like that is used:
> 
> list_add_tail(&p->tasks, &init_task.tasks);
> 
> where the first argument is the element to be inserted and the second
> argument corresponds the list header of task_struct.
> Thus where the list header of chunks will be stored? Any idea?
> 

A compressed page is stored in many chunks. chunk_head->chunk_list is made to 
point to first of these chunks and these 'related' chunks are linked together 
using chunk->next


Cheers,
Nitin Gupta