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net: page_pool: factor out page_pool recycle check 

The check is duplicated in 2 places, factor it out into a common helper.

Signed-off-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Link: https://lore.kernel.org/r/20240308204500.1112858-1-almasrymina@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Mina Almasry 2024-03-08 12:44:58 -08:00 committed by Jakub Kicinski
parent ad32b3c35c
commit 46f40172b6
1 changed files with 7 additions and 2 deletions
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9
net/core/page_pool.c
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@ -657,6 +657,11 @@ static bool page_pool_recycle_in_cache(struct page *page,
return true;
}
static bool __page_pool_page_can_be_recycled(const struct page *page)
{
return page_ref_count(page) == 1 && !page_is_pfmemalloc(page);
}
/* If the page refcnt == 1, this will try to recycle the page.
* if PP_FLAG_DMA_SYNC_DEV is set, we'll try to sync the DMA area for
* the configured size min(dma_sync_size, pool->max_len).
@ -678,7 +683,7 @@ __page_pool_put_page(struct page_pool *pool, struct page *page,
* page is NOT reusable when allocated when system is under
* some pressure. (page_is_pfmemalloc)
*/
if (likely(page_ref_count(page) == 1 && !page_is_pfmemalloc(page))) {
if (likely(__page_pool_page_can_be_recycled(page))) {
/* Read barrier done in page_ref_count / READ_ONCE */
if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
@ -793,7 +798,7 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
if (likely(page_pool_unref_page(page, drain_count)))
return NULL;
if (page_ref_count(page) == 1 && !page_is_pfmemalloc(page)) {
if (__page_pool_page_can_be_recycled(page)) {
if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
page_pool_dma_sync_for_device(pool, page, -1);