716a3942b3
- kvm-scsi-generic-Fix-emulated-block-limits-VPD-page.patch [bz#2120275] - kvm-vhost-Get-vring-base-from-vq-not-svq.patch [bz#2114060] - kvm-vdpa-Skip-the-maps-not-in-the-iova-tree.patch [bz#2114060] - kvm-vdpa-do-not-save-failed-dma-maps-in-SVQ-iova-tree.patch [bz#2114060] - kvm-util-Return-void-on-iova_tree_remove.patch [bz#2114060] - kvm-util-accept-iova_tree_remove_parameter-by-value.patch [bz#2114060] - kvm-vdpa-Remove-SVQ-vring-from-iova_tree-at-shutdown.patch [bz#2114060] - kvm-vdpa-Make-SVQ-vring-unmapping-return-void.patch [bz#2114060] - kvm-vhost-Always-store-new-kick-fd-on-vhost_svq_set_svq_.patch [bz#2114060] - kvm-vdpa-Use-ring-hwaddr-at-vhost_vdpa_svq_unmap_ring.patch [bz#2114060] - kvm-vhost-stop-transfer-elem-ownership-in-vhost_handle_g.patch [bz#2114060] - kvm-vhost-use-SVQ-element-ndescs-instead-of-opaque-data-.patch [bz#2114060] - kvm-vhost-Delete-useless-read-memory-barrier.patch [bz#2114060] - kvm-vhost-Do-not-depend-on-NULL-VirtQueueElement-on-vhos.patch [bz#2114060] - kvm-vhost_net-Add-NetClientInfo-start-callback.patch [bz#2114060] - kvm-vhost_net-Add-NetClientInfo-stop-callback.patch [bz#2114060] - kvm-vdpa-add-net_vhost_vdpa_cvq_info-NetClientInfo.patch [bz#2114060] - kvm-vdpa-Move-command-buffers-map-to-start-of-net-device.patch [bz#2114060] - kvm-vdpa-extract-vhost_vdpa_net_cvq_add-from-vhost_vdpa_.patch [bz#2114060] - kvm-vhost_net-add-NetClientState-load-callback.patch [bz#2114060] - kvm-vdpa-Add-virtio-net-mac-address-via-CVQ-at-start.patch [bz#2114060] - kvm-vdpa-Delete-CVQ-migration-blocker.patch [bz#2114060] - kvm-virtio-scsi-fix-race-in-virtio_scsi_dataplane_start.patch [bz#2099541] - Resolves: bz#2120275 (Wrong max_sectors_kb and Maximum transfer length on the pass-through device [rhel-9.1]) - Resolves: bz#2114060 (vDPA state restore support through control virtqueue in Qemu) - Resolves: bz#2099541 (qemu coredump with error Assertion `qemu_mutex_iothread_locked()' failed when repeatly hotplug/unplug disks in pause status)
48 lines
1.7 KiB
Diff
48 lines
1.7 KiB
Diff
From 773d1bb4e9ea9ca704372e52569955937f91f15c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Tue, 23 Aug 2022 20:30:28 +0200
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Subject: [PATCH 13/23] vhost: Delete useless read memory barrier
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 116: vdpa: Restore device state on destination
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RH-Bugzilla: 2114060
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [12/21] 0e238fe934b1fc2c7e10b6f693468bc25ea3243f (eperezmartin/qemu-kvm)
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2114060
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Upstream status: git@github.com:jasowang/qemu.git net-next
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As discussed in previous series [1], this memory barrier is useless with
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the atomic read of used idx at vhost_svq_more_used. Deleting it.
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[1] https://lists.nongnu.org/archive/html/qemu-devel/2022-07/msg02616.html
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit cdfb1612ba0f9b76367c96ce26ba94fedc7a0e61)
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---
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hw/virtio/vhost-shadow-virtqueue.c | 3 ---
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1 file changed, 3 deletions(-)
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diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
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index 7792f3db1d..d36afbc547 100644
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--- a/hw/virtio/vhost-shadow-virtqueue.c
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+++ b/hw/virtio/vhost-shadow-virtqueue.c
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@@ -509,9 +509,6 @@ size_t vhost_svq_poll(VhostShadowVirtqueue *svq)
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if (unlikely(g_get_monotonic_time() - start_us > 10e6)) {
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return 0;
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}
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-
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- /* Make sure we read new used_idx */
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- smp_rmb();
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} while (true);
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}
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--
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2.31.1
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