diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2026-03-23 15:43:59 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-04-01 19:21:12 +0300 |
| commit | 48f253d65d39a45d2eed395bf6b8ac3bb8b1e992 (patch) | |
| tree | 04e2085a28a35c9e5a6cd5b1dc7081e700ce4ef3 | |
| parent | 7df542a6657534694779948195cc4d36ace575b5 (diff) | |
| download | linux-48f253d65d39a45d2eed395bf6b8ac3bb8b1e992.tar.xz | |
io_uring/zcrx: warn on alloc with non-empty pp cache
Page pool ensures the cache is empty before asking to refill it. Warn if
the assumption is violated.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/9c9792d6e65f3780d57ff83b6334d341ed9a5f29.1774261953.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | io_uring/zcrx.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c index a7790d609f40..eca30f8461cc 100644 --- a/io_uring/zcrx.c +++ b/io_uring/zcrx.c @@ -1075,8 +1075,8 @@ static netmem_ref io_pp_zc_alloc_netmems(struct page_pool *pp, gfp_t gfp) struct io_zcrx_ifq *ifq = io_pp_to_ifq(pp); /* pp should already be ensuring that */ - if (unlikely(pp->alloc.count)) - goto out_return; + if (WARN_ON_ONCE(pp->alloc.count)) + return 0; io_zcrx_ring_refill(pp, ifq); if (likely(pp->alloc.count)) |