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From: Klaus Jensen <its@irrelevant.dk>
To: qemu-devel@nongnu.org
Cc: Fam Zheng <fam@euphon.net>, Kevin Wolf <kwolf@redhat.com>,
	Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
	qemu-block@nongnu.org, Klaus Jensen <k.jensen@samsung.com>,
	Max Reitz <mreitz@redhat.com>, Keith Busch <kbusch@kernel.org>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Klaus Jensen <its@irrelevant.dk>
Subject: [PATCH v2 11/11] Partially revert "hw/block/nvme: drain namespaces on sq deletion"
Date: Thu, 17 Jun 2021 21:06:57 +0200	[thread overview]
Message-ID: <20210617190657.110823-12-its@irrelevant.dk> (raw)
In-Reply-To: <20210617190657.110823-1-its@irrelevant.dk>

From: Klaus Jensen <k.jensen@samsung.com>

This partially reverts commit 98f84f5a4eca5c03e32fff20f246d9b4b96d6422.

Since all "multi aio" commands are now reimplemented to properly track
the nested aiocbs, we can revert the "hack" that was introduced to make
sure all requests we're properly drained upon sq deletion.

The revert is partial since we keep the assert that no outstanding
requests remain on the submission queue after the explicit cancellation.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/ctrl.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
index ec8ddb76cd39..5a1d25265a9d 100644
--- a/hw/nvme/ctrl.c
+++ b/hw/nvme/ctrl.c
@@ -3918,7 +3918,6 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
     NvmeSQueue *sq;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
-    uint32_t nsid;
 
     if (unlikely(!qid || nvme_check_sqid(n, qid))) {
         trace_pci_nvme_err_invalid_del_sq(qid);
@@ -3930,22 +3929,8 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
     sq = n->sq[qid];
     while (!QTAILQ_EMPTY(&sq->out_req_list)) {
         r = QTAILQ_FIRST(&sq->out_req_list);
-        if (r->aiocb) {
-            blk_aio_cancel(r->aiocb);
-        }
-    }
-
-    /*
-     * Drain all namespaces if there are still outstanding requests that we
-     * could not cancel explicitly.
-     */
-    if (!QTAILQ_EMPTY(&sq->out_req_list)) {
-        for (nsid = 1; nsid <= NVME_MAX_NAMESPACES; nsid++) {
-            NvmeNamespace *ns = nvme_ns(n, nsid);
-            if (ns) {
-                nvme_ns_drain(ns);
-            }
-        }
+        assert(r->aiocb);
+        blk_aio_cancel(r->aiocb);
     }
 
     assert(QTAILQ_EMPTY(&sq->out_req_list));
-- 
2.32.0



  parent reply	other threads:[~2021-06-17 19:19 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-17 19:06 [PATCH v2 00/11] hw/nvme: reimplement all multi-aio commands with custom aiocbs Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 01/11] hw/nvme: reimplement flush to allow cancellation Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 02/11] hw/nvme: add nvme_block_status_all helper Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 03/11] hw/nvme: reimplement dsm to allow cancellation Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 04/11] hw/nvme: save reftag when generating pi Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 05/11] hw/nvme: remove assert from nvme_get_zone_by_slba Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 06/11] hw/nvme: use prinfo directly in nvme_check_prinfo and nvme_dif_check Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 07/11] hw/nvme: add dw0/1 to the req completion trace event Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 08/11] hw/nvme: reimplement the copy command to allow aio cancellation Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 09/11] hw/nvme: reimplement zone reset to allow cancellation Klaus Jensen
2021-06-17 19:06 ` [PATCH v2 10/11] hw/nvme: reimplement format nvm " Klaus Jensen
2021-06-17 19:06 ` Klaus Jensen [this message]
2021-06-28 16:00   ` [PATCH v2 11/11] Partially revert "hw/block/nvme: drain namespaces on sq deletion" Keith Busch
2021-06-28 16:33     ` Klaus Jensen
2021-06-25 18:47 ` [PATCH v2 00/11] hw/nvme: reimplement all multi-aio commands with custom aiocbs Keith Busch
2021-06-28 17:08 ` Klaus Jensen

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