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From: "Michal Koutný" <mkoutny@suse.com>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: "David Airlie" <airlied@linux.ie>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Arve Hjønnevåg" <arve@android.com>,
	"Todd Kjos" <tkjos@android.com>,
	"Martijn Coenen" <maco@android.com>,
	"Joel Fernandes" <joel@joelfernandes.org>,
	"Christian Brauner" <brauner@kernel.org>,
	"Hridya Valsaraju" <hridya@google.com>,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Benjamin Gaignard" <benjamin.gaignard@linaro.org>,
	"Liam Mark" <lmark@codeaurora.org>,
	"Laura Abbott" <labbott@redhat.com>,
	"Brian Starkey" <Brian.Starkey@arm.com>,
	"John Stultz" <john.stultz@linaro.org>,
	"Tejun Heo" <tj@kernel.org>, "Zefan Li" <lizefan.x@bytedance.com>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Shuah Khan" <shuah@kernel.org>,
	kaleshsingh@google.com, Kenny.Ho@amd.com,
	skhan@linuxfoundation.org, dri-devel@lists.freedesktop.org,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
	cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [RFC v4 5/8] dmabuf: Add gpu cgroup charge transfer function
Date: Tue, 29 Mar 2022 17:21:42 +0200	[thread overview]
Message-ID: <20220329152142.GA15794@blackbody.suse.cz> (raw)
In-Reply-To: <20220328035951.1817417-6-tjmercier@google.com>

Hi.

On Mon, Mar 28, 2022 at 03:59:44AM +0000, "T.J. Mercier" <tjmercier@google.com> wrote:
> From: Hridya Valsaraju <hridya@google.com>
> 
> The dma_buf_charge_transfer function provides a way for processes to

(s/dma_bug_charge_transfer/dma_bug_transfer_charge/)

> transfer charge of a buffer to a different process. This is essential
> for the cases where a central allocator process does allocations for
> various subsystems, hands over the fd to the client who requested the
> memory and drops all references to the allocated memory.

I understood from [1] some buffers are backed by regular RAM. How are
these charges going to be transferred (if so)?


Thanks,
Michal

[1]
https://lore.kernel.org/r/CABdmKX2NSAKMC6rReMYfo2SSVNxEXcS466hk3qF6YFt-j-+_NQ@mail.gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: "Michal Koutný" <mkoutny@suse.com>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: "Zefan Li" <lizefan.x@bytedance.com>,
	linux-doc@vger.kernel.org, "David Airlie" <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org,
	"Benjamin Gaignard" <benjamin.gaignard@linaro.org>,
	kaleshsingh@google.com, "Joel Fernandes" <joel@joelfernandes.org>,
	"Shuah Khan" <shuah@kernel.org>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	Kenny.Ho@amd.com, "Jonathan Corbet" <corbet@lwn.net>,
	"Martijn Coenen" <maco@android.com>,
	"Laura Abbott" <labbott@redhat.com>,
	linux-media@vger.kernel.org, linux-kselftest@vger.kernel.org,
	"Todd Kjos" <tkjos@android.com>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	linaro-mm-sig@lists.linaro.org, "Tejun Heo" <tj@kernel.org>,
	skhan@linuxfoundation.org, cgroups@vger.kernel.org,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Christian Brauner" <brauner@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org, "Liam Mark" <lmark@codeaurora.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Arve Hjønnevåg" <arve@android.com>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Hridya Valsaraju" <hridya@google.com>
Subject: Re: [RFC v4 5/8] dmabuf: Add gpu cgroup charge transfer function
Date: Tue, 29 Mar 2022 17:21:42 +0200	[thread overview]
Message-ID: <20220329152142.GA15794@blackbody.suse.cz> (raw)
In-Reply-To: <20220328035951.1817417-6-tjmercier@google.com>

Hi.

On Mon, Mar 28, 2022 at 03:59:44AM +0000, "T.J. Mercier" <tjmercier@google.com> wrote:
> From: Hridya Valsaraju <hridya@google.com>
> 
> The dma_buf_charge_transfer function provides a way for processes to

(s/dma_bug_charge_transfer/dma_bug_transfer_charge/)

> transfer charge of a buffer to a different process. This is essential
> for the cases where a central allocator process does allocations for
> various subsystems, hands over the fd to the client who requested the
> memory and drops all references to the allocated memory.

I understood from [1] some buffers are backed by regular RAM. How are
these charges going to be transferred (if so)?


Thanks,
Michal

[1]
https://lore.kernel.org/r/CABdmKX2NSAKMC6rReMYfo2SSVNxEXcS466hk3qF6YFt-j-+_NQ@mail.gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: "Michal Koutný" <mkoutny@suse.com>
To: "T.J. Mercier" <tjmercier@google.com>
Cc: "David Airlie" <airlied@linux.ie>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Arve Hjønnevåg" <arve@android.com>,
	"Todd Kjos" <tkjos@android.com>,
	"Martijn Coenen" <maco@android.com>,
	"Joel Fernandes" <joel@joelfernandes.org>,
	"Christian Brauner" <brauner@kernel.org>,
	"Hridya Valsaraju" <hridya@google.com>,
	"Suren Baghdasaryan" <surenb@google.com>,
	"Sumit Semwal" <sumit.semwal@linaro.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Benjamin Gaignard" <benjamin.gaignard@linaro.org>,
	"Liam Mark" <lmark@codeaurora.org>
Subject: Re: [RFC v4 5/8] dmabuf: Add gpu cgroup charge transfer function
Date: Tue, 29 Mar 2022 17:21:42 +0200	[thread overview]
Message-ID: <20220329152142.GA15794@blackbody.suse.cz> (raw)
In-Reply-To: <20220328035951.1817417-6-tjmercier@google.com>

Hi.

On Mon, Mar 28, 2022 at 03:59:44AM +0000, "T.J. Mercier" <tjmercier@google.com> wrote:
> From: Hridya Valsaraju <hridya@google.com>
> 
> The dma_buf_charge_transfer function provides a way for processes to

(s/dma_bug_charge_transfer/dma_bug_transfer_charge/)

> transfer charge of a buffer to a different process. This is essential
> for the cases where a central allocator process does allocations for
> various subsystems, hands over the fd to the client who requested the
> memory and drops all references to the allocated memory.

I understood from [1] some buffers are backed by regular RAM. How are
these charges going to be transferred (if so)?


Thanks,
Michal

[1]
https://lore.kernel.org/r/CABdmKX2NSAKMC6rReMYfo2SSVNxEXcS466hk3qF6YFt-j-+_NQ@mail.gmail.com

  reply	other threads:[~2022-03-29 15:21 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-28  3:59 [RFC v4 0/8] Proposal for a GPU cgroup controller T.J. Mercier
2022-03-28  3:59 ` T.J. Mercier
2022-03-28  3:59 ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 1/8] gpu: rfc: " T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 2/8] cgroup: gpu: Add a cgroup controller for allocator attribution of GPU memory T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-29 16:59   ` Tejun Heo
2022-03-29 16:59     ` Tejun Heo
2022-03-29 16:59     ` Tejun Heo
2022-03-30 20:56     ` T.J. Mercier
2022-03-30 20:56       ` T.J. Mercier
2022-03-30 20:56       ` T.J. Mercier
2022-04-04 17:41       ` Tejun Heo
2022-04-04 17:41         ` Tejun Heo
2022-04-04 17:41         ` Tejun Heo
2022-04-04 17:49         ` T.J. Mercier
2022-04-04 17:49           ` T.J. Mercier
2022-04-04 17:49           ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 3/8] dmabuf: Use the GPU cgroup charge/uncharge APIs T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 4/8] dmabuf: heaps: export system_heap buffers with GPU cgroup charging T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28 14:36   ` Daniel Vetter
2022-03-28 14:36     ` Daniel Vetter
2022-03-28 14:36     ` Daniel Vetter
     [not found]     ` <YkHH/0Use7F30UUE-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2022-03-28 18:28       ` T.J. Mercier
2022-03-28 18:28     ` T.J. Mercier
2022-03-28 18:28       ` T.J. Mercier
2022-03-29  8:42       ` Daniel Vetter
2022-03-29  8:42         ` Daniel Vetter
2022-03-29  8:42         ` Daniel Vetter
2022-03-29 16:50         ` Tejun Heo
2022-03-29 16:50           ` Tejun Heo
2022-03-29 16:50           ` Tejun Heo
2022-03-29 17:52         ` T.J. Mercier
2022-03-29 17:52           ` T.J. Mercier
     [not found]         ` <YkLGbL5Z3HVCyVkK-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2022-03-29 17:52           ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 5/8] dmabuf: Add gpu cgroup charge transfer function T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-29 15:21   ` Michal Koutný [this message]
2022-03-29 15:21     ` Michal Koutný
2022-03-29 15:21     ` Michal Koutný
2022-04-01 18:41     ` T.J. Mercier
2022-04-01 18:41       ` T.J. Mercier
2022-04-01 18:41       ` T.J. Mercier
2022-04-05 12:12       ` Michal Koutný
2022-04-05 12:12         ` Michal Koutný
2022-04-05 12:12         ` Michal Koutný
2022-04-05 17:48         ` T.J. Mercier
2022-04-05 17:48           ` T.J. Mercier
2022-04-05 17:48           ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 6/8] binder: Add a buffer flag to relinquish ownership of fds T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 7/8] binder: use __kernel_pid_t and __kernel_uid_t for userspace T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59 ` [RFC v4 8/8] selftests: Add binder cgroup gpu memory transfer test T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier
2022-03-28  3:59   ` T.J. Mercier

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