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From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>
Cc: "Fam Zheng" <fam@euphon.net>, "Kevin Wolf" <kwolf@redhat.com>,
	qemu-block@nongnu.org, "Max Reitz" <mreitz@redhat.com>,
	"Maxim Levitsky" <mlevitsk@redhat.com>,
	"Philippe Mathieu-Daudé" <philmd@redhat.com>
Subject: [PATCH 16/17] block/nvme: Check BDRVNVMeState::plugged out of nvme_kick()
Date: Thu, 25 Jun 2020 20:48:37 +0200	[thread overview]
Message-ID: <20200625184838.28172-17-philmd@redhat.com> (raw)
In-Reply-To: <20200625184838.28172-1-philmd@redhat.com>

The queues are tied to the hardware, not to the block driver.
As this function doesn't need to know about the BDRVNVMeState,
move the 'plugged' check to the caller.
Since in nvme_aio_unplug() we know that s->plugged is false,
we don't need the check.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 block/nvme.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/block/nvme.c b/block/nvme.c
index 0f7cc568ef..b335dfdb73 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -246,9 +246,9 @@ fail:
 }
 
 /* With q->lock */
-static void nvme_kick(BDRVNVMeState *s, NVMeQueuePair *q)
+static void nvme_kick(NVMeQueuePair *q)
 {
-    if (s->plugged || !q->need_kick) {
+    if (!q->need_kick) {
         return;
     }
     trace_nvme_kick(q->index);
@@ -406,7 +406,9 @@ static void nvme_submit_command(BDRVNVMeState *s, NVMeQueuePair *q,
            q->sq.tail * NVME_SQ_ENTRY_BYTES, cmd, sizeof(*cmd));
     q->sq.tail = (q->sq.tail + 1) % NVME_QUEUE_SIZE;
     q->need_kick++;
-    nvme_kick(s, q);
+    if (!s->plugged) {
+        nvme_kick(q);
+    }
     nvme_process_completion(s, q);
     qemu_mutex_unlock(&q->lock);
 }
@@ -1311,7 +1313,7 @@ static void nvme_aio_unplug(BlockDriverState *bs)
     for (i = QUEUE_INDEX_IO(0); i < s->nr_queues; i++) {
         NVMeQueuePair *q = s->queues[i];
         qemu_mutex_lock(&q->lock);
-        nvme_kick(s, q);
+        nvme_kick(q);
         nvme_process_completion(s, q);
         qemu_mutex_unlock(&q->lock);
     }
-- 
2.21.3



  parent reply	other threads:[~2020-06-25 18:59 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-25 18:48 [PATCH 00/17] block/nvme: Various cleanups required to use multiple queues Philippe Mathieu-Daudé
2020-06-25 18:48 ` [PATCH 01/17] block/nvme: Avoid further processing if trace event not enabled Philippe Mathieu-Daudé
2020-06-26 10:36   ` Stefan Hajnoczi
2020-06-26 14:02     ` Philippe Mathieu-Daudé
2020-06-29 13:02       ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 02/17] block/nvme: Let nvme_create_queue_pair() fail gracefully Philippe Mathieu-Daudé
2020-06-26 11:11   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 03/17] block/nvme: Define QUEUE_INDEX macros to ease code review Philippe Mathieu-Daudé
2020-06-26 11:12   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 04/17] block/nvme: Be explicit we share NvmeIdCtrl / NvmeIdNs structures Philippe Mathieu-Daudé
2020-06-26 11:19   ` Stefan Hajnoczi
2020-06-26 12:45     ` Philippe Mathieu-Daudé
2020-06-25 18:48 ` [PATCH 05/17] block/nvme: Replace qemu_try_blockalign0 by qemu_try_blockalign/memset Philippe Mathieu-Daudé
2020-06-26 12:20   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 06/17] block/nvme: Replace qemu_try_blockalign(bs) by qemu_try_memalign(pg_sz) Philippe Mathieu-Daudé
2020-06-26 12:24   ` Stefan Hajnoczi
2020-06-26 12:48     ` Philippe Mathieu-Daudé
2020-06-29 13:07       ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 07/17] block/nvme: Move code around Philippe Mathieu-Daudé
2020-06-26 12:25   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 08/17] block/nvme: Use correct type void* Philippe Mathieu-Daudé
2020-06-26 12:31   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 09/17] block/nvme: Remove unused argument from nvme_free_queue_pair() Philippe Mathieu-Daudé
2020-06-26 12:31   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 10/17] block/nvme: Simplify nvme_init_queue() arguments Philippe Mathieu-Daudé
2020-06-26 12:31   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 11/17] block/nvme: Simplify nvme_create_queue_pair() arguments Philippe Mathieu-Daudé
2020-06-26 12:31   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 12/17] block/nvme: Simplify nvme_kick trace event Philippe Mathieu-Daudé
2020-06-26 12:33   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 13/17] block/nvme: Simplify completion trace events Philippe Mathieu-Daudé
2020-06-26 12:34   ` Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 14/17] block/nvme: Replace BDRV_POLL_WHILE by AIO_WAIT_WHILE Philippe Mathieu-Daudé
2020-06-26 12:35   ` Stefan Hajnoczi
2020-06-25 18:48 ` [RFC PATCH 15/17] block/nvme: Use per-queue AIO context Philippe Mathieu-Daudé
2020-06-26 12:42   ` Stefan Hajnoczi
2020-06-26 12:59   ` Stefan Hajnoczi
2020-06-25 18:48 ` Philippe Mathieu-Daudé [this message]
2020-06-26 12:43   ` [PATCH 16/17] block/nvme: Check BDRVNVMeState::plugged out of nvme_kick() Stefan Hajnoczi
2020-06-25 18:48 ` [PATCH 17/17] block/nvme: Check BDRVNVMeState::plugged out of nvme_process_completion Philippe Mathieu-Daudé
2020-06-26 12:46   ` Stefan Hajnoczi
2020-06-25 19:27 ` [PATCH 00/17] block/nvme: Various cleanups required to use multiple queues no-reply
2020-06-26  9:18   ` Philippe Mathieu-Daudé

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