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From: Mike Christie <michael.christie@oracle.com>
To: target-devel@vger.kernel.org, linux-scsi@vger.kernel.org,
	stefanha@redhat.com, pbonzini@redhat.com, jasowang@redhat.com,
	mst@redhat.com, sgarzare@redhat.com,
	virtualization@lists.linux-foundation.org
Cc: Mike Christie <michael.christie@oracle.com>
Subject: [PATCH 3/5] vhost-scsi: reduce flushes during endpoint clearing
Date: Tue, 25 May 2021 12:47:31 -0500	[thread overview]
Message-ID: <20210525174733.6212-4-michael.christie@oracle.com> (raw)
In-Reply-To: <20210525174733.6212-1-michael.christie@oracle.com>

vhost_scsi_flush will flush everything, so we can clear the backends then
flush, then destroy. We don't need to flush before each vq destruction
because after the flush we will have made sure there can be no new cmds
started and there are no running cmds.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/vhost/scsi.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 2f9633ef26aa..927ebc52d822 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -1747,11 +1747,12 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
 			mutex_lock(&vq->mutex);
 			vhost_vq_set_backend(vq, NULL);
 			mutex_unlock(&vq->mutex);
-			/*
-			 * Make sure cmds are not running before tearing them
-			 * down.
-			 */
-			vhost_scsi_flush(vs);
+		}
+		/* Make sure cmds are not running before tearing them down. */
+		vhost_scsi_flush(vs);
+
+		for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
+			vq = &vs->vqs[i].vq;
 			vhost_scsi_destroy_vq_cmds(vq);
 		}
 	}
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Mike Christie <michael.christie@oracle.com>
To: target-devel@vger.kernel.org, linux-scsi@vger.kernel.org,
	stefanha@redhat.com, pbonzini@redhat.com, jasowang@redhat.com,
	mst@redhat.com, sgarzare@redhat.com,
	virtualization@lists.linux-foundation.org
Subject: [PATCH 3/5] vhost-scsi: reduce flushes during endpoint clearing
Date: Tue, 25 May 2021 12:47:31 -0500	[thread overview]
Message-ID: <20210525174733.6212-4-michael.christie@oracle.com> (raw)
In-Reply-To: <20210525174733.6212-1-michael.christie@oracle.com>

vhost_scsi_flush will flush everything, so we can clear the backends then
flush, then destroy. We don't need to flush before each vq destruction
because after the flush we will have made sure there can be no new cmds
started and there are no running cmds.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/vhost/scsi.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 2f9633ef26aa..927ebc52d822 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -1747,11 +1747,12 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
 			mutex_lock(&vq->mutex);
 			vhost_vq_set_backend(vq, NULL);
 			mutex_unlock(&vq->mutex);
-			/*
-			 * Make sure cmds are not running before tearing them
-			 * down.
-			 */
-			vhost_scsi_flush(vs);
+		}
+		/* Make sure cmds are not running before tearing them down. */
+		vhost_scsi_flush(vs);
+
+		for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
+			vq = &vs->vqs[i].vq;
 			vhost_scsi_destroy_vq_cmds(vq);
 		}
 	}
-- 
2.25.1

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Virtualization@lists.linux-foundation.org
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  parent reply	other threads:[~2021-05-25 17:47 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-25 17:47 vhost: coding style and flush cleanups Mike Christie
2021-05-25 17:47 ` Mike Christie
2021-05-25 17:47 ` [PATCH 1/5] vhost: remove work arg from vhost_work_flush Mike Christie
2021-05-25 17:47   ` Mike Christie
2021-05-27 13:22   ` Stefano Garzarella
2021-05-27 13:22     ` Stefano Garzarella
2021-05-25 17:47 ` [PATCH 2/5] vhost-scsi: remove extra flushes Mike Christie
2021-05-25 17:47   ` Mike Christie
2021-05-25 17:47 ` Mike Christie [this message]
2021-05-25 17:47   ` [PATCH 3/5] vhost-scsi: reduce flushes during endpoint clearing Mike Christie
2021-05-25 17:47 ` [PATCH 4/5] vhost: fix poll coding style Mike Christie
2021-05-25 17:47   ` Mike Christie
2021-05-25 17:47 ` [PATCH 5/5] vhost: fix up vhost_work " Mike Christie
2021-05-25 17:47   ` Mike Christie
2021-05-27 13:23   ` Stefano Garzarella
2021-05-27 13:23     ` Stefano Garzarella

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