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[68.103.222.6]) by smtp.gmail.com with ESMTPSA id n37sm1464589otn.9.2021.05.07.15.15.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 07 May 2021 15:15:28 -0700 (PDT) From: Connor Kuehl To: virtio-fs@redhat.com Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, virtualization@lists.linux-foundation.org, Miklos Szeredi , Stefan Hajnoczi , Vivek Goyal Subject: [PATCH] virtiofs: Enable multiple request queues Date: Fri, 7 May 2021 17:15:27 -0500 Message-Id: <20210507221527.699516-1-ckuehl@redhat.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Distribute requests across the multiqueue complex automatically based on the IRQ affinity. Suggested-by: Stefan Hajnoczi Signed-off-by: Connor Kuehl --- fs/fuse/virtio_fs.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index bcb8a02e2d8b..dcdc8b7b1ad5 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -30,6 +30,10 @@ static DEFINE_MUTEX(virtio_fs_mutex); static LIST_HEAD(virtio_fs_instances); +struct virtio_fs_vq; + +DEFINE_PER_CPU(struct virtio_fs_vq *, this_cpu_fsvq); + enum { VQ_HIPRIO, VQ_REQUEST @@ -673,6 +677,7 @@ static int virtio_fs_setup_vqs(struct virtio_device *vdev, struct virtqueue **vqs; vq_callback_t **callbacks; const char **names; + struct irq_affinity desc = { .pre_vectors = 1, .nr_sets = 1, }; unsigned int i; int ret = 0; @@ -681,6 +686,9 @@ static int virtio_fs_setup_vqs(struct virtio_device *vdev, if (fs->num_request_queues == 0) return -EINVAL; + fs->num_request_queues = min_t(unsigned int, nr_cpu_ids, + fs->num_request_queues); + fs->nvqs = VQ_REQUEST + fs->num_request_queues; fs->vqs = kcalloc(fs->nvqs, sizeof(fs->vqs[VQ_HIPRIO]), GFP_KERNEL); if (!fs->vqs) @@ -710,12 +718,24 @@ static int virtio_fs_setup_vqs(struct virtio_device *vdev, names[i] = fs->vqs[i].name; } - ret = virtio_find_vqs(vdev, fs->nvqs, vqs, callbacks, names, NULL); + ret = virtio_find_vqs(vdev, fs->nvqs, vqs, callbacks, names, &desc); if (ret < 0) goto out; - for (i = 0; i < fs->nvqs; i++) + for (i = 0; i < fs->nvqs; i++) { + const struct cpumask *mask; + unsigned int cpu; + fs->vqs[i].vq = vqs[i]; + if (i == VQ_HIPRIO) + continue; + + mask = vdev->config->get_vq_affinity(vdev, i); + for_each_cpu(cpu, mask) { + struct virtio_fs_vq **cpu_vq = per_cpu_ptr(&this_cpu_fsvq, cpu); + *cpu_vq = &fs->vqs[i]; + } + } virtio_fs_start_all_queues(fs); out: @@ -877,8 +897,6 @@ static int virtio_fs_probe(struct virtio_device *vdev) if (ret < 0) goto out; - /* TODO vq affinity */ - ret = virtio_fs_setup_dax(vdev, fs); if (ret < 0) goto out_vqs; @@ -1225,7 +1243,6 @@ static int virtio_fs_enqueue_req(struct virtio_fs_vq *fsvq, static void virtio_fs_wake_pending_and_unlock(struct fuse_iqueue *fiq) __releases(fiq->lock) { - unsigned int queue_id = VQ_REQUEST; /* TODO multiqueue */ struct virtio_fs *fs; struct fuse_req *req; struct virtio_fs_vq *fsvq; @@ -1245,7 +1262,8 @@ __releases(fiq->lock) req->in.h.nodeid, req->in.h.len, fuse_len_args(req->args->out_numargs, req->args->out_args)); - fsvq = &fs->vqs[queue_id]; + fsvq = this_cpu_read(this_cpu_fsvq); + ret = virtio_fs_enqueue_req(fsvq, req, false); if (ret < 0) { if (ret == -ENOMEM || ret == -ENOSPC) { -- 2.30.2