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RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)'
From: |
David Laight |
Subject: |
RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)' |
Date: |
Tue, 13 Jun 2023 12:25:03 +0000 |
From: Kasireddy, Vivek <vivek.kasireddy@intel.com>
> Sent: 13 June 2023 09:26
...
> > Is my understanding correct, that we can effectively long-term pin
> > (worse than mlock) 64 MiB per UDMABUF_CREATE, allowing eventually !root
> > users
>
> The 64 MiB limit is the theoretical upper bound that we have not seen hit in
> practice. Typically, for a 1920x1080 resolution (commonly used in Guests),
> the size of the FB is ~8 MB (1920x1080x4). And, most modern Graphics
> compositors flip between two FBs.
What code does and what potentially malicious code might do
are entirely different things.
David
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- [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Mike Kravetz, 2023/06/08
- Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Greg Kroah-Hartman, 2023/06/09
- RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Kasireddy, Vivek, 2023/06/12
- Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', David Hildenbrand, 2023/06/12
- RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Kasireddy, Vivek, 2023/06/13
- RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)',
David Laight <=
- Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', David Hildenbrand, 2023/06/13
- Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Hugh Dickins, 2023/06/13
- RE: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Kasireddy, Vivek, 2023/06/14
- Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', David Hildenbrand, 2023/06/15
Re: [PATCH] udmabuf: revert 'Add support for mapping hugepages (v4)', Gerd Hoffmann, 2023/06/19