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From: Liuxiangdong <liuxiangdong5@huawei.com>
To: <xieyongji@bytedance.com>
Cc: "Fangyi (Eric)" <eric.fangyi@huawei.com>,
	<yebiaoxiang@huawei.com>, <x86@kernel.org>, <kvm@vger.kernel.org>,
	<linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v13 00/13] Introduce VDUSE - vDPA Device in Userspace
Date: Mon, 11 Oct 2021 15:32:49 +0800	[thread overview]
Message-ID: <6163E8A1.8080901@huawei.com> (raw)
In-Reply-To: <20210831103634.33-1-xieyongji@bytedance.com>

Hi, Yongji.

I tried vduse with null-blk:

   $ qemu-storage-daemon \
       --chardev socket,id=charmonitor,path=/tmp/qmp.sock,server,nowait \
       --monitor chardev=charmonitor \
       --blockdev 
driver=host_device,cache.direct=on,aio=native,filename=/dev/nullb0,node-name=disk0 
\
       --export 
type=vduse-blk,id=test,node-name=disk0,writable=on,name=vduse-null,num-queues=16,queue-size=128

The qemu-storage-daemon is yours 
(https://github.com/bytedance/qemu/tree/vduse)

And then, how can we use this vduse-null (dev/vduse/vduse-null) in vm(QEMU)?

Because qemu-storage-daemon open this vduse-null in vduse_dev_init(), 
all the operations which open this dev
will report "failed to open '/dev/vduse/vduse-null': Device or resource 
busy".

Or something I understood wrong?

Thanks!
Xiangdong Liu

  parent reply	other threads:[~2021-10-11  7:32 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-31 10:36 [PATCH v13 00/13] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-08-31 10:36 ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 01/13] iova: Export alloc_iova_fast() and free_iova_fast() Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 02/13] eventfd: Export eventfd_wake_count to modules Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-09-01  2:50   ` Jason Wang
2021-09-01  2:50     ` Jason Wang
2021-09-01  2:50     ` Jason Wang
2021-08-31 10:36 ` [PATCH v13 03/13] file: Export receive_fd() " Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-09-05 15:57   ` Michael S. Tsirkin
2021-09-05 15:57     ` Michael S. Tsirkin
2021-09-05 15:57     ` Michael S. Tsirkin
2021-09-05 16:44     ` Al Viro
2021-09-05 16:44       ` Al Viro
2021-09-05 16:44       ` Al Viro
2021-08-31 10:36 ` [PATCH v13 04/13] vdpa: Fix some coding style issues Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 05/13] vdpa: Add reset callback in vdpa_config_ops Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-09-06  5:55   ` Michael S. Tsirkin
2021-09-06  5:55     ` Michael S. Tsirkin
2021-09-06  5:55     ` Michael S. Tsirkin
2021-09-06  6:09     ` Yongji Xie
2021-09-06  6:09       ` Yongji Xie
2021-09-06  6:37       ` Michael S. Tsirkin
2021-09-06  6:37         ` Michael S. Tsirkin
2021-09-06  6:37         ` Michael S. Tsirkin
2021-09-06  7:06         ` Yongji Xie
2021-09-06  7:06           ` Yongji Xie
2021-09-06  8:00           ` Michael S. Tsirkin
2021-09-06  8:00             ` Michael S. Tsirkin
2021-09-06  8:00             ` Michael S. Tsirkin
2021-09-06  8:45             ` Yongji Xie
2021-09-06  8:45               ` Yongji Xie
2021-09-06 10:43               ` Michael S. Tsirkin
2021-09-06 10:43                 ` Michael S. Tsirkin
2021-09-06 10:43                 ` Michael S. Tsirkin
2021-09-06 12:13                 ` Yongji Xie
2021-09-06 12:13                   ` Yongji Xie
2021-08-31 10:36 ` [PATCH v13 06/13] vhost-vdpa: Handle the failure of vdpa_reset() Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 07/13] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 08/13] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 09/13] vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap() Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 10/13] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 11/13] vduse: Implement an MMU-based software IOTLB Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 12/13] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-08-31 10:36 ` [PATCH v13 13/13] Documentation: Add documentation for VDUSE Xie Yongji
2021-08-31 10:36   ` Xie Yongji
2021-10-11  7:32 ` Liuxiangdong [this message]
2021-10-11  8:31   ` [PATCH v13 00/13] Introduce VDUSE - vDPA Device in Userspace Yongji Xie
2021-10-11  8:32     ` Yongji Xie

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