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Tue, 14 Jul 2026 07:30:19 -0700 (PDT) From: Jiri Pirko To: linux-rdma@vger.kernel.org Cc: cgroups@vger.kernel.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-kselftest@vger.kernel.org, jgg@ziepe.ca, leon@kernel.org, parav@nvidia.com, mbloch@nvidia.com, cmeiohas@nvidia.com, roman.gushchin@linux.dev, bvanassche@acm.org, zyjzyj2000@gmail.com, shuah@kernel.org, tj@kernel.org, mkoutny@suse.com, hannes@cmpxchg.org, alibuda@linux.alibaba.com, dust.li@linux.alibaba.com, sidraya@linux.ibm.com, wenjia@linux.ibm.com, yanjun.zhu@linux.dev, cui.tao@linux.dev Subject: [PATCH rdma-next v2 12/14] RDMA/rxe: Allow queue VMAs to outlive ucontexts Date: Tue, 14 Jul 2026 16:29:25 +0200 Message-ID: <20260714142927.1298897-13-jiri@resnulli.us> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260714142927.1298897-1-jiri@resnulli.us> References: <20260714142927.1298897-1-jiri@resnulli.us> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jiri Pirko Prepare queue mappings for asynchronous ucontext disassociation during device disable. Rely on the VMA page references to preserve mapped memory until the final unmap. Signed-off-by: Jiri Pirko --- v1->v2: - new patch --- drivers/infiniband/sw/rxe/rxe_mmap.c | 35 ++-------------------------- 1 file changed, 2 insertions(+), 33 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe_mmap.c b/drivers/infiniband/sw/rxe/rxe_mmap.c index 7f723a2f3700..a4ead89ccbd3 100644 --- a/drivers/infiniband/sw/rxe/rxe_mmap.c +++ b/drivers/infiniband/sw/rxe/rxe_mmap.c @@ -11,7 +11,6 @@ #include "rxe.h" #include "rxe_loc.h" -#include "rxe_queue.h" void rxe_mmap_release(struct kref *ref) { @@ -30,29 +29,6 @@ void rxe_mmap_release(struct kref *ref) kfree(ip); } -/* - * open and close keep track of how many times the memory region is mapped, - * to avoid releasing it. - */ -static void rxe_vma_open(struct vm_area_struct *vma) -{ - struct rxe_mmap_info *ip = vma->vm_private_data; - - kref_get(&ip->ref); -} - -static void rxe_vma_close(struct vm_area_struct *vma) -{ - struct rxe_mmap_info *ip = vma->vm_private_data; - - kref_put(&ip->ref, rxe_mmap_release); -} - -static const struct vm_operations_struct rxe_vm_ops = { - .open = rxe_vma_open, - .close = rxe_vma_close, -}; - /** * rxe_mmap - create a new mmap region * @context: the IB user context of the process making the mmap() call @@ -106,17 +82,10 @@ int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) list_del_init(&ip->pending_mmaps); spin_unlock_bh(&rxe->pending_lock); - vma->vm_ops = &rxe_vm_ops; - vma->vm_private_data = ip; - ret = remap_vmalloc_range(vma, ip->obj, 0); - if (ret) { - vma->vm_private_data = NULL; - vma->vm_ops = NULL; - kref_put(&ip->ref, rxe_mmap_release); + kref_put(&ip->ref, rxe_mmap_release); + if (ret) rxe_dbg_dev(rxe, "err %d from remap_vmalloc_range\n", ret); - goto done; - } done: return ret; -- 2.54.0