7b74d99404
- kvm-arm-virt-Register-highmem-and-gic-version-as-class-p.patch [bz#1952449] - kvm-hw-arm-virt-Add-8.5-and-9.0-machine-types-and-remove.patch [bz#1952449] - kvm-aarch64-rh-devices-add-CONFIG_PVPANIC_PCI.patch [bz#1747467] - kvm-spec-Do-not-build-qemu-kvm-block-gluster.patch [bz#1964795] - kvm-spec-Do-not-link-pcnet-and-ne2k_pci-roms.patch [bz#1965961] - kvm-redhat-s390x-add-rhel-8.5.0-compat-machine.patch [bz#1957194] - kvm-redhat-add-missing-entries-in-hw_compat_rhel_8_4.patch [bz#1957194] - kvm-redhat-Define-pseries-rhel8.5.0-machine-type.patch [bz#1957194] - kvm-virtio-net-failover-add-missing-remove_migration_sta.patch [bz#1957194] - kvm-hw-arm-virt-Disable-PL011-clock-migration-through-hw.patch [bz#1957194] - kvm-virtio-blk-Fix-rollback-path-in-virtio_blk_data_plan.patch [bz#1957194] - kvm-virtio-blk-Configure-all-host-notifiers-in-a-single-.patch [bz#1957194] - kvm-virtio-scsi-Set-host-notifiers-and-callbacks-separat.patch [bz#1957194] - kvm-virtio-scsi-Configure-all-host-notifiers-in-a-single.patch [bz#1957194] - kvm-hw-arm-smmuv3-Another-range-invalidation-fix.patch [bz#1957194] - Resolves: bz#1952449 ([aarch64] define RHEL9 machine types) - Resolves: bz#1747467 ([aarch64] [qemu] PVPANIC support) - Resolves: bz#1964795 (Remove qemu-kvm-block-gluster package) - Resolves: bz#1965961 (Remove links to not build roms) - Resolves: bz#1957194 (Synchronize RHEL-AV 8.5.0 changes to RHEL 9.0.0 Beta)
92 lines
3.3 KiB
Diff
92 lines
3.3 KiB
Diff
From 5e7855d3c9d5a59d2c0ac05444428b058ca9abb8 Mon Sep 17 00:00:00 2001
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From: Greg Kurz <groug@kaod.org>
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Date: Wed, 26 May 2021 09:03:54 -0400
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Subject: [PATCH 14/15] virtio-scsi: Configure all host notifiers in a single
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MR transaction
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RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
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RH-MergeRequest: 5: Synchronize RHEL-AV 8.5 release 18 to RHEL 9 Beta
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RH-Commit: [11/12] f3c785c4b63aeb3a7b153f2fc17e86c983f98c23 (mrezanin/centos-src-qemu-kvm)
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RH-Bugzilla: 1957194
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RH-Acked-by: Danilo Cesar Lemes de Paula <ddepaula@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Greg Kurz <gkurz@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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This allows the virtio-scsi-pci device to batch the setup of all its
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host notifiers. This significantly improves boot time of VMs with a
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high number of vCPUs, e.g. from 6m5.563s down to 1m2.884s for a
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pseries machine with 384 vCPUs.
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Note that memory_region_transaction_commit() must be called before
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virtio_bus_cleanup_host_notifier() because the latter might close
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ioeventfds that the transaction still assumes to be around when it
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commits.
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Signed-off-by: Greg Kurz <groug@kaod.org>
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Message-Id: <20210407143501.244343-5-groug@kaod.org>
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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit c4f5dcc4360a02085a633fd7a90b7ac395ca1ba4)
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Signed-off-by: Greg Kurz <gkurz@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/scsi/virtio-scsi-dataplane.c | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c
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index b2cb3d9dcc..28e003250a 100644
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--- a/hw/scsi/virtio-scsi-dataplane.c
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+++ b/hw/scsi/virtio-scsi-dataplane.c
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@@ -152,6 +152,8 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
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goto fail_guest_notifiers;
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}
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+ memory_region_transaction_begin();
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+
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rc = virtio_scsi_set_host_notifier(s, vs->ctrl_vq, 0);
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if (rc != 0) {
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goto fail_host_notifiers;
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@@ -173,6 +175,8 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
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vq_init_count++;
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}
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+ memory_region_transaction_commit();
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+
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aio_context_acquire(s->ctx);
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virtio_queue_aio_set_host_notifier_handler(vs->ctrl_vq, s->ctx,
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virtio_scsi_data_plane_handle_ctrl);
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@@ -192,6 +196,11 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
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fail_host_notifiers:
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for (i = 0; i < vq_init_count; 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 < vq_init_count; i++) {
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virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
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}
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k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, false);
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@@ -229,8 +238,15 @@ void virtio_scsi_dataplane_stop(VirtIODevice *vdev)
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blk_drain_all(); /* ensure there are no in-flight requests */
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+ memory_region_transaction_begin();
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+
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for (i = 0; i < vs->conf.num_queues + 2; 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 < vs->conf.num_queues + 2; i++) {
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virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
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}
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--
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2.27.0
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