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68 lines
2.3 KiB
68 lines
2.3 KiB
9 months ago
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From 2816f6ce20c496e21947f215112be34a5cb93606 Mon Sep 17 00:00:00 2001
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From: Stefan Hajnoczi <stefanha@redhat.com>
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Date: Thu, 14 Sep 2023 10:01:01 -0400
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Subject: [PATCH 076/101] virtio-blk: don't lock AioContext in the submission
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code path
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RH-Author: Kevin Wolf <kwolf@redhat.com>
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RH-MergeRequest: 214: Remove AioContext lock
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RH-Jira: RHEL-15965
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Commit: [7/26] e0de2744cb319569ea008334e45ee5fc2ba9b6d7 (kmwolf/centos-qemu-kvm)
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There is no need to acquire the AioContext lock around blk_aio_*() or
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blk_get_geometry() anymore. I/O plugging (defer_call()) also does not
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require the AioContext lock anymore.
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Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Message-ID: <20230914140101.1065008-5-stefanha@redhat.com>
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Reviewed-by: Kevin Wolf <kwolf@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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---
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hw/block/virtio-blk.c | 5 -----
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1 file changed, 5 deletions(-)
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diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
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index f5315df042..e110f9718b 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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@@ -1111,7 +1111,6 @@ void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq)
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MultiReqBuffer mrb = {};
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bool suppress_notifications = virtio_queue_get_notification(vq);
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- aio_context_acquire(blk_get_aio_context(s->blk));
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defer_call_begin();
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do {
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@@ -1137,7 +1136,6 @@ void virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq)
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}
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defer_call_end();
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- aio_context_release(blk_get_aio_context(s->blk));
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}
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static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
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@@ -1168,7 +1166,6 @@ static void virtio_blk_dma_restart_bh(void *opaque)
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s->rq = NULL;
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}
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- aio_context_acquire(blk_get_aio_context(s->conf.conf.blk));
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while (req) {
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VirtIOBlockReq *next = req->next;
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if (virtio_blk_handle_request(req, &mrb)) {
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@@ -1192,8 +1189,6 @@ static void virtio_blk_dma_restart_bh(void *opaque)
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/* Paired with inc in virtio_blk_dma_restart_cb() */
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blk_dec_in_flight(s->conf.conf.blk);
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-
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- aio_context_release(blk_get_aio_context(s->conf.conf.blk));
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}
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static void virtio_blk_dma_restart_cb(void *opaque, bool running,
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--
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2.39.3
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