From 368154f5ef2fbd47d5b544175b1850e19cd06806 Mon Sep 17 00:00:00 2001 From: Yunsheng Lin Date: Tue, 24 Aug 2021 17:06:49 +0800 Subject: [PATCH] page_pool: use relaxed atomic for release side accounting There is no need to synchronize the account updating, so use the relaxed atomic to avoid some memory barrier in the data path. Acked-by: Jesper Dangaard Brouer Signed-off-by: Yunsheng Lin Acked-by: Ilias Apalodimas Signed-off-by: David S. Miller --- net/core/page_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/core/page_pool.c b/net/core/page_pool.c index e1409056965a0..1a6978427d6c8 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -370,7 +370,7 @@ skip_dma_unmap: /* This may be the last page returned, releasing the pool, so * it is not safe to reference pool afterwards. */ - count = atomic_inc_return(&pool->pages_state_release_cnt); + count = atomic_inc_return_relaxed(&pool->pages_state_release_cnt); trace_page_pool_state_release(pool, page, count); } EXPORT_SYMBOL(page_pool_release_page); -- 2.39.5