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73 lines
2.5 KiB
73 lines
2.5 KiB
8 months ago
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From 282cebc22987958d11efc76e4f6ddb9601e709d9 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Fri, 19 Jan 2024 08:57:47 -0500
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Subject: [PATCH 18/22] virtio-blk: tolerate failure to set BlockBackend
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AioContext
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RH-Author: Stefan Hajnoczi <stefanha@redhat.com>
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RH-MergeRequest: 219: virtio-blk: add iothread-vq-mapping parameter
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RH-Jira: RHEL-17369 RHEL-20764 RHEL-7356
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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RH-Acked-by: Hanna Czenczek <hreitz@redhat.com>
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RH-Commit: [14/17] edb113ce9fea0c1a88ae7b5d61c35c1981e6993f (stefanha/centos-stream-qemu-kvm)
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We no longer rely on setting the AioContext since the block layer
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IO_CODE APIs can be called from any thread. Now it's just a hint to help
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block jobs and other operations co-locate themselves in a thread with
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the guest I/O requests. Keep going if setting the AioContext fails.
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Suggested-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Message-ID: <20240119135748.270944-6-stefanha@redhat.com>
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Reviewed-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit ea0736d7f84ead109a6b701427991828f97724c3)
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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---
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hw/block/virtio-blk.c | 19 +++++--------------
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1 file changed, 5 insertions(+), 14 deletions(-)
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diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
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index f48ce5cbb8..81de06c9f6 100644
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--- a/hw/block/virtio-blk.c
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+++ b/hw/block/virtio-blk.c
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@@ -1786,11 +1786,14 @@ static int virtio_blk_start_ioeventfd(VirtIODevice *vdev)
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memory_region_transaction_commit();
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+ /*
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+ * Try to change the AioContext so that block jobs and other operations can
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+ * co-locate their activity in the same AioContext. If it fails, nevermind.
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+ */
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r = blk_set_aio_context(s->conf.conf.blk, s->vq_aio_context[0],
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&local_err);
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if (r < 0) {
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- error_report_err(local_err);
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- goto fail_aio_context;
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+ warn_report_err(local_err);
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}
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/*
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@@ -1819,18 +1822,6 @@ static int virtio_blk_start_ioeventfd(VirtIODevice *vdev)
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}
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return 0;
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- fail_aio_context:
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- memory_region_transaction_begin();
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-
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- for (i = 0; i < nvqs; i++) {
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- virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
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- }
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-
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- memory_region_transaction_commit();
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-
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- for (i = 0; i < nvqs; i++) {
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- virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
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- }
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fail_host_notifiers:
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k->set_guest_notifiers(qbus->parent, nvqs, false);
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fail_guest_notifiers:
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--
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2.39.3
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