13 Jun
2023
13 Jun
'23
12:25 p.m.
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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