On Thu, Aug 02, 2018 at 03:58:40PM -0400, Tony Battersby wrote:
> @@ -339,11 +360,16 @@ void *dma_pool_alloc(struct dma_pool *po
>
> spin_lock_irqsave(&pool->lock, flags);
>
> - list_add(&page->page_list, &pool->page_list);
> + list_add(&page->dma_list, &pool->page_list[POOL_AVAIL_IDX]);
> ready:
> page->in_use++;
> offset = page->offset;
> page->offset = *(int *)(page->vaddr + offset);
> + if (page->offset >= pool->allocation) {
> + /* Move page from the "available" list to the "full" list. */
> + list_del(&page->dma_list);
> + list_add(&page->dma_list, &pool->page_list[POOL_FULL_IDX]);
I think this should be:
list_move_tail(&page->dma_list,
&pool->page_list[POOL_FULL_IDX]);
> @@ -444,6 +476,11 @@ void dma_pool_free(struct dma_pool *pool
> #endif
>
> page->in_use--;
> + if (page->offset >= pool->allocation) {
> + /* Move page from the "full" list to the "available" list. */
> + list_del(&page->dma_list);
> + list_add(&page->dma_list, &pool->page_list[POOL_AVAIL_IDX]);
This one probably wants to be
list_move(&page->dma_list, &pool->page_list[POOL_AVAIL_IDX]);
so that it's first-in-line to be allocated from for cache warmth purposes.
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