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bh=g9K903/Yegnn9dUEU+6nFxa0MGx2PhUv24bahJVyoCo=; b=hnZ9UIngvyN+6TvORixpWKhVCdM49PcAfCU62QsJALcs8AGDh/R4vd8X86R/F3/OZvICmG IGaDiqrypEJ4TSmnKptLLi2Zq/MBeAOtxdxDXRj8g7hbiYIuyNNYwJdjmfFBeM0gsWSHCy +FibfUo2cAsC6UVIMoe/+n0aC72H+R8= X-MC-Unique: mRG-4jmUNH29YzEVrS2e9g-1 From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 12/14] virtio-blk: tolerate failure to set BlockBackend AioContext Date: Fri, 19 Jan 2024 19:13:25 +0100 Message-ID: <20240119181327.236745-13-kwolf@redhat.com> In-Reply-To: <20240119181327.236745-1-kwolf@redhat.com> References: <20240119181327.236745-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -45 X-Spam_score: -4.6 X-Spam_bar: ---- X-Spam_report: (-4.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.519, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1705688113859100003 Content-Type: text/plain; charset="utf-8" From: Stefan Hajnoczi We no longer rely on setting the AioContext since the block layer IO_CODE APIs can be called from any thread. Now it's just a hint to help block jobs and other operations co-locate themselves in a thread with the guest I/O requests. Keep going if setting the AioContext fails. Suggested-by: Kevin Wolf Signed-off-by: Stefan Hajnoczi Message-ID: <20240119135748.270944-6-stefanha@redhat.com> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- hw/block/virtio-blk.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 4525988d92..73248d15c8 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -1786,11 +1786,14 @@ static int virtio_blk_start_ioeventfd(VirtIODevice = *vdev) =20 memory_region_transaction_commit(); =20 + /* + * Try to change the AioContext so that block jobs and other operation= s can + * co-locate their activity in the same AioContext. If it fails, never= mind. + */ r =3D blk_set_aio_context(s->conf.conf.blk, s->vq_aio_context[0], &local_err); if (r < 0) { - error_report_err(local_err); - goto fail_aio_context; + warn_report_err(local_err); } =20 /* @@ -1819,18 +1822,6 @@ static int virtio_blk_start_ioeventfd(VirtIODevice *= vdev) } return 0; =20 - fail_aio_context: - memory_region_transaction_begin(); - - for (i =3D 0; i < nvqs; i++) { - virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false); - } - - memory_region_transaction_commit(); - - for (i =3D 0; i < nvqs; i++) { - virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i); - } fail_host_notifiers: k->set_guest_notifiers(qbus->parent, nvqs, false); fail_guest_notifiers: --=20 2.43.0