netdev - [PATCH io_uring for-6.18 17/20] io_uring/zcrx: don't adjust free cache space

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Message-ID: <c8e94ec4b524bb2efb91b8ae2636d830d6b56f0c.1758030357.git.asml.silence@gmail.com>
Date: Tue, 16 Sep 2025 15:28:00 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: io-uring@...r.kernel.org
Cc: asml.silence@...il.com,
	axboe@...nel.dk,
	netdev@...r.kernel.org
Subject: [PATCH io_uring for-6.18 17/20] io_uring/zcrx: don't adjust free cache space

The cache should be empty when io_pp_zc_alloc_netmems() is called,
that's promised by page pool and further checked, so there is no need to
recalculate the available space in io_zcrx_ring_refill().

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 io_uring/zcrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index 630b19ebb47e..a805f744c774 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -759,7 +759,7 @@ static void io_zcrx_ring_refill(struct page_pool *pp,
 	guard(spinlock_bh)(&ifq->rq_lock);
 
 	entries = io_zcrx_rqring_entries(ifq);
-	entries = min_t(unsigned, entries, PP_ALLOC_CACHE_REFILL - pp->alloc.count);
+	entries = min_t(unsigned, entries, PP_ALLOC_CACHE_REFILL);
 	if (unlikely(!entries))
 		return;
 
-- 
2.49.0