Messages in this thread Patch in this message | | | From | Yunsheng Lin <> | Subject | [PATCH net-next v2 1/2] page_pool: use relaxed atomic for release side accounting | Date | Fri, 20 Aug 2021 14:56:50 +0800 |
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There is no need to synchronize the account updating, so use the relaxed atomic to avoid some memory barrier in the data path.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> --- 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 e140905..1a69784 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -370,7 +370,7 @@ void page_pool_release_page(struct page_pool *pool, struct page *page) /* 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); -- 2.7.4
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