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[PATCH v3 4/6] nbd/server: avoid per-NBDRequest nbd_client_get/put()
From: |
Stefan Hajnoczi |
Subject: |
[PATCH v3 4/6] nbd/server: avoid per-NBDRequest nbd_client_get/put() |
Date: |
Thu, 21 Dec 2023 14:24:50 -0500 |
nbd_trip() processes a single NBD request from start to finish and holds
an NBDClient reference throughout. NBDRequest does not outlive the scope
of nbd_trip(). Therefore it is unnecessary to ref/unref NBDClient for
each NBDRequest.
Removing these nbd_client_get()/nbd_client_put() calls will make
thread-safety easier in the commits that follow.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
nbd/server.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/nbd/server.c b/nbd/server.c
index 895cf0a752..0b09ccc8dc 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1557,7 +1557,6 @@ static NBDRequestData *nbd_request_get(NBDClient *client)
client->nb_requests++;
req = g_new0(NBDRequestData, 1);
- nbd_client_get(client);
req->client = client;
return req;
}
@@ -1578,8 +1577,6 @@ static void nbd_request_put(NBDRequestData *req)
}
nbd_client_receive_next_request(client);
-
- nbd_client_put(client);
}
static void blk_aio_attached(AioContext *ctx, void *opaque)
--
2.43.0
- [PATCH v3 0/6] qemu-iotests fixes for Kevin's block tree, Stefan Hajnoczi, 2023/12/21
- [PATCH v3 1/6] fixup block-coroutine-wrapper: use qemu_get_current_aio_context(), Stefan Hajnoczi, 2023/12/21
- [PATCH v3 3/6] fixup scsi: only access SCSIDevice->requests from one thread, Stefan Hajnoczi, 2023/12/21
- [PATCH v3 4/6] nbd/server: avoid per-NBDRequest nbd_client_get/put(),
Stefan Hajnoczi <=
- [PATCH v3 6/6] nbd/server: introduce NBDClient->lock to protect fields, Stefan Hajnoczi, 2023/12/21
- [PATCH v3 5/6] nbd/server: only traverse NBDExport->clients from main loop thread, Stefan Hajnoczi, 2023/12/21
- [PATCH v3 2/6] fixup block: remove AioContext locking, Stefan Hajnoczi, 2023/12/21
- Re: [PATCH v3 0/6] qemu-iotests fixes for Kevin's block tree, Kevin Wolf, 2023/12/21