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From: Julien Grall <julien@xen.org>
To: Stefano Stabellini <sstabellini@kernel.org>,
	Penny Zheng <Penny.Zheng@arm.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
	nd <nd@arm.com>, Bertrand Marquis <Bertrand.Marquis@arm.com>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH v1 11/13] xen/arm: store shm-info for deferred foreign memory map
Date: Sat, 9 Apr 2022 10:14:50 +0100	[thread overview]
Message-ID: <adfb6995-b241-792c-51ef-59364a441976@xen.org> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2204081523110.3066615@ubuntu-linux-20-04-desktop>

Hi Stefano,

On 08/04/2022 23:46, Stefano Stabellini wrote:
> So I don't think that when the owner dies, we need to actively go and
> unmap the pages at the borrowers. Also because it would likely cause
> them to crash: from their point of view the memory was there, and
> suddenly it is not there anymore.

I agree with that. Also, the code is likely going to be quite complex 
because there are a lot of things that can go wrong (e.g. the domain ID 
has been re-used). I will comment there directly.

Cheers,

-- 
Julien Grall


  reply	other threads:[~2022-04-09  9:15 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-11  6:11 [PATCH v1 00/13] Static shared memory on dom0less system Penny Zheng
2022-03-11  6:11 ` [PATCH v1 01/13] xen/arm: introduce static shared memory Penny Zheng
2022-03-18  1:59   ` Stefano Stabellini
2022-03-11  6:11 ` [PATCH v1 02/13] xen/arm: introduce a special domain DOMID_SHARED Penny Zheng
2022-03-18  1:59   ` Stefano Stabellini
2022-03-18  6:43     ` Penny Zheng
2022-03-18 22:02       ` Stefano Stabellini
2022-03-18  8:53   ` Jan Beulich
2022-03-18 21:50     ` Stefano Stabellini
2022-03-21  8:48       ` Jan Beulich
2022-03-21 20:03         ` Stefano Stabellini
2022-04-09  9:11           ` Julien Grall
2022-04-15  8:08             ` Penny Zheng
2022-04-15 22:18               ` Stefano Stabellini
2022-04-15 23:45                 ` Julien Grall
2022-03-18 22:20     ` Stefano Stabellini
2022-04-15  9:52     ` Penny Zheng
2022-04-15 23:34       ` Julien Grall
2022-04-19  8:10       ` Jan Beulich
2022-03-11  6:11 ` [PATCH v1 03/13] xen/arm: allocate static shared memory to dom_shared Penny Zheng
2022-03-18  1:59   ` Stefano Stabellini
2022-03-18  8:35     ` Penny Zheng
2022-03-18 22:27       ` Stefano Stabellini
2022-03-11  6:11 ` [PATCH v1 04/13] xen/arm: add P2M type parameter in guest_physmap_add_pages Penny Zheng
2022-03-11  6:11 ` [PATCH v1 05/13] xen/arm: introduce get_pages_from_gfn Penny Zheng
2022-03-11  6:11 ` [PATCH v1 06/13] xen/arm: set up shared memory foreign mapping for borrower domain Penny Zheng
2022-03-18  2:00   ` Stefano Stabellini
2022-03-29  3:44     ` Penny Zheng
2022-04-08 22:18       ` Stefano Stabellini
2022-04-08 22:50         ` Julien Grall
2022-04-08 23:18           ` Stefano Stabellini
2022-04-08 22:59   ` Julien Grall
2022-04-09  9:30     ` Julien Grall
2022-04-20  8:53       ` Penny Zheng
2022-04-20  8:51     ` Penny Zheng
2022-03-11  6:11 ` [PATCH v1 07/13] xen/arm: create shared memory nodes in guest device tree Penny Zheng
2022-03-18  2:00   ` Stefano Stabellini
2022-03-11  6:11 ` [PATCH v1 08/13] xen/arm: destroy static shared memory when de-construct domain Penny Zheng
2022-04-09  9:25   ` Julien Grall
2022-04-21  7:00     ` Penny Zheng
2022-03-11  6:11 ` [PATCH v1 09/13] xen/arm: enable statically shared memory on Dom0 Penny Zheng
2022-03-11  6:11 ` [PATCH v1 10/13] xen/arm: allocate static shared memory to a specific owner domain Penny Zheng
2022-03-18  2:00   ` Stefano Stabellini
2022-03-11  6:11 ` [PATCH v1 11/13] xen/arm: store shm-info for deferred foreign memory map Penny Zheng
2022-03-18  2:01   ` Stefano Stabellini
2022-03-29  8:37     ` Penny Zheng
2022-04-08 22:46       ` Stefano Stabellini
2022-04-09  9:14         ` Julien Grall [this message]
2022-03-11  6:11 ` [PATCH v1 12/13] xen/arm: defer foreign memory map in shm_init_late Penny Zheng
2022-03-11  6:11 ` [PATCH v1 13/13] xen/arm: unmap foreign memory mapping when destroyed domain is owner domain Penny Zheng
2022-04-09  9:44   ` Julien Grall

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