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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>
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@ -657,6 +657,11 @@ static bool page_pool_recycle_in_cache(struct page *page,
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return true;
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}
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static bool __page_pool_page_can_be_recycled(const struct page *page)
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{
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return page_ref_count(page) == 1 && !page_is_pfmemalloc(page);
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}
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/* If the page refcnt == 1, this will try to recycle the page.
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* if PP_FLAG_DMA_SYNC_DEV is set, we'll try to sync the DMA area for
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* the configured size min(dma_sync_size, pool->max_len).
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@ -678,7 +683,7 @@ __page_pool_put_page(struct page_pool *pool, struct page *page,
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* page is NOT reusable when allocated when system is under
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* some pressure. (page_is_pfmemalloc)
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*/
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if (likely(page_ref_count(page) == 1 && !page_is_pfmemalloc(page))) {
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if (likely(__page_pool_page_can_be_recycled(page))) {
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/* Read barrier done in page_ref_count / READ_ONCE */
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if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
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@ -793,7 +798,7 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
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if (likely(page_pool_unref_page(page, drain_count)))
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return NULL;
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if (page_ref_count(page) == 1 && !page_is_pfmemalloc(page)) {
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if (__page_pool_page_can_be_recycled(page)) {
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if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
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page_pool_dma_sync_for_device(pool, page, -1);
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