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b=RGNFYGn4CtkTg1zqvbtwpm2QX2akkhLXZUldJcQh/wY6BJIcZyWcOuEOJYmNcq5Lj Uj6Bh+yCkzkhs31qbnmwB/PtXdrbvnMqxlvi6wknmB/78qy1R/PukrrJGqmOB69yGp Iedr10mzuTFMWuNNp+qNCDQiG7xROGfltWMA1ONZfMbFYa0qXUFzGxqjRCfwFEP6z7 vh4O3pxi/BJb0+UedVdyG6n1f4hyrZzKDVL+WNrdwRrlRNF0r6evBD/7tKTdhNwzMF RJ8vOKlRXWraalDy2C6grQ5T2M1hKnbvVmrkDw6wWipuGgJ8dcKGY7we8g6o5YZhgo Kudt8R1xEuw7w== From: "Mike Rapoport (Microsoft)" Date: Tue, 30 Jun 2026 13:52:33 +0300 Subject: [PATCH 5/5] IB/rdmavt: use kzalloc() to allocate QPN-map pages MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260630-b4-rdma-v1-5-ab42bcf0de92@kernel.org> References: <20260630-b4-rdma-v1-0-ab42bcf0de92@kernel.org> In-Reply-To: <20260630-b4-rdma-v1-0-ab42bcf0de92@kernel.org> To: Jason Gunthorpe , Leon Romanovsky Cc: Dennis Dalessandro , Mike Rapoport , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-rdma@vger.kernel.org X-Mailer: b4 0.15.2 X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 8F465180009 X-Stat-Signature: puqade4thumgujeprkpdryin9xp7azst X-HE-Tag: 1782816765-683610 X-HE-Meta: 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 owTQfuv7 8I7UNMwXO/YUANCzOUjXKw0wtCa3D5oIB8T3BQoUJuqewpGBKcsl2qVP95oXnDh7h9hT8hz/tGMlEpitR3XWlV96jKysE3qIfLNLIJS1K46PNHVhbsFA9YTDVa0kYGZJ/jYwnjxPF1DP3Zb+CSUtsLnqe0J7vw6wOFjqQIu+1jSSHCB4o7ZG3BHoEljLz/H2RLUyBsCFVjOVb+8vUE2Z4YhEQ2jKlGxlceN+iRZu/JCICf6OnpN0+arOdvfi4hbhPELDfLsZadqAsTJs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: get_map_page() allocates bitmap pages using get_zeroed_page(). The bitmaps can be allocated with kmalloc() as there's nothing special about them to go directly to the page allocator. kmalloc() provides a better API that does not require ugly casts and kfree() does not need to know the size of the freed object. Performance difference between kmalloc() and __get_free_pages() is not measurable as both allocators take an object/page from a per-CPU list for fast path allocations. For the slow path the performance is anyway determined by the amount of reclaim involved rather than by what allocator is used. Replace use of get_zeroed_page() with kzalloc() and free_page() with kfree(). Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com Signed-off-by: Mike Rapoport (Microsoft) --- drivers/infiniband/sw/rdmavt/qp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c index 70e7d08fdce6..c40cce69e945 100644 --- a/drivers/infiniband/sw/rdmavt/qp.c +++ b/drivers/infiniband/sw/rdmavt/qp.c @@ -263,7 +263,7 @@ static inline bool wss_exceeds_threshold(struct rvt_wss *wss) static void get_map_page(struct rvt_qpn_table *qpt, struct rvt_qpn_map *map) { - unsigned long page = get_zeroed_page(GFP_KERNEL); + void *page = kzalloc(PAGE_SIZE, GFP_KERNEL); /* * Free the page if someone raced with us installing it. @@ -271,9 +271,9 @@ static void get_map_page(struct rvt_qpn_table *qpt, spin_lock(&qpt->lock); if (map->page) - free_page(page); + kfree(page); else - map->page = (void *)page; + map->page = page; spin_unlock(&qpt->lock); } @@ -343,7 +343,7 @@ static void free_qpn_table(struct rvt_qpn_table *qpt) int i; for (i = 0; i < ARRAY_SIZE(qpt->map); i++) - free_page((unsigned long)qpt->map[i].page); + kfree(qpt->map[i].page); } /** -- 2.53.0