Hi,
Vivek (thanks!) just pulled the patch into drm-misc-next /
for-linux-next so it should go into 7.3 \o/
On 03.08.26 17:04, Xaver Hugl wrote:
Oh, nice! I should've checked the list before making a patch :D
Could your commit also be backported to stable? I fear I'll need to
find ways to work around this or disable the relevant optimizations in
KWin on older kernels either way, but it would be great if that could
at least be a very temporary problem.
I'm not sure how realistic that is / how the policies around such
changes are - there shouldn't be any serious risk of regressions, but
who knows.
OTOH there are several other options AFAICS:
1. affected distros could backport the patch or set a higher limit via
kernel command line
2. kwin could try to check the size
(`/sys/module/udmabuf/parameters/size_limit_mb`) and disallow the code
path if the required buffer size exceeds it (or just have a fallback in
place whenever allocation fails)
Arguably having a working fallback path were possible would be good
style either way - would it be a big effort to do so in kwin?
Best regards
- Xaver
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