From: "Michael S. Tsirkin" <mst@redhat.com>
To: Yongji Xie <xieyongji@bytedance.com>
Cc: Liu Xiaodong <xiaodong.liu@intel.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
virtualization <virtualization@lists.linux-foundation.org>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
songmuchun@bytedance.com
Subject: Re: [PATCH 5/6] vduse: Support registering userspace memory for IOTLB
Date: Wed, 29 Jun 2022 07:28:53 -0400 [thread overview]
Message-ID: <20220629072825-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <CACycT3vaNLYRid5SsT11LuVCaGXbBfV=q7c7SUp1+r9BcRpwkw@mail.gmail.com>
On Wed, Jun 29, 2022 at 06:19:31PM +0800, Yongji Xie wrote:
> > No i mean you decrement the lock twice. Question is can two bounce
> > buffers share a page?
> >
>
> I think we can't. I will find a way to prevent it.
>
> Thanks,
> Yongji
I guess it doesn't matter much then.
--
MST
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WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Yongji Xie <xieyongji@bytedance.com>
Cc: Jason Wang <jasowang@redhat.com>,
Liu Xiaodong <xiaodong.liu@intel.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
virtualization <virtualization@lists.linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
songmuchun@bytedance.com
Subject: Re: [PATCH 5/6] vduse: Support registering userspace memory for IOTLB
Date: Wed, 29 Jun 2022 07:28:53 -0400 [thread overview]
Message-ID: <20220629072825-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <CACycT3vaNLYRid5SsT11LuVCaGXbBfV=q7c7SUp1+r9BcRpwkw@mail.gmail.com>
On Wed, Jun 29, 2022 at 06:19:31PM +0800, Yongji Xie wrote:
> > No i mean you decrement the lock twice. Question is can two bounce
> > buffers share a page?
> >
>
> I think we can't. I will find a way to prevent it.
>
> Thanks,
> Yongji
I guess it doesn't matter much then.
--
MST
next prev parent reply other threads:[~2022-06-29 11:29 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-29 8:25 [PATCH 0/6] VDUSE: Support registering userspace memory as bounce buffer Xie Yongji
2022-06-29 8:25 ` [PATCH 1/6] vduse: Remove unnecessary spin lock protection Xie Yongji
2022-06-29 8:25 ` [PATCH 2/6] vduse: Use memcpy_{to,from}_page() in do_bounce() Xie Yongji
2022-06-29 8:25 ` [PATCH 3/6] vduse: Support using userspace pages as bounce buffer Xie Yongji
2022-06-29 8:25 ` [PATCH 4/6] vduse: Support querying IOLTB information Xie Yongji
2022-06-29 8:25 ` [PATCH 5/6] vduse: Support registering userspace memory for IOTLB Xie Yongji
2022-06-29 8:42 ` Michael S. Tsirkin
2022-06-29 8:42 ` Michael S. Tsirkin
2022-06-29 9:26 ` Yongji Xie
2022-06-29 9:54 ` Michael S. Tsirkin
2022-06-29 9:54 ` Michael S. Tsirkin
2022-06-29 10:19 ` Yongji Xie
2022-06-29 11:28 ` Michael S. Tsirkin [this message]
2022-06-29 11:28 ` Michael S. Tsirkin
2022-06-29 8:25 ` [PATCH 6/6] vduse: Update api version to 1 Xie Yongji
2022-06-29 8:33 ` Michael S. Tsirkin
2022-06-29 8:33 ` Michael S. Tsirkin
2022-06-29 9:02 ` Yongji Xie
2022-06-29 9:22 ` Michael S. Tsirkin
2022-06-29 9:22 ` Michael S. Tsirkin
2022-06-29 9:28 ` Yongji Xie
2022-07-04 9:26 ` [PATCH 0/6] VDUSE: Support registering userspace memory as bounce buffer Liu Xiaodong
2022-07-04 9:26 ` Liu Xiaodong
2022-07-04 10:02 ` Yongji Xie
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