Re: SIGBUS with gbm_bo_map() and Intel ARC
Pierre Ossman <[email protected]>
| Newsgroups | gmane.comp.video.mesa3d.devel |
|---|---|
| Organization | Cendio AB |
| Message-ID | <[email protected]> |
On 6/19/24 11:36, Pierre Ossman wrote: > > Is there something special I need to pay attention to when doing cross > GPU stuff? I would have assumed that gbm_bo_import() would have > complained if this was an incompatible setup. > It does indeed look like some step is missing. If I examine /proc/<pid>/maps, I can see that the accessed memory address is associated with the wrong render node: Crash reading 0x7fffe4176000 7fffe4176000-7fffe4400000 rw-s 100602000 00:06 500 /dev/dri/renderD128 The X server is using renderD128, but the client is using renderD129. This works with other X servers, so I assume there is some way to resolve this. But where do I start looking? The fd I'm getting is a DMA-BUF fd, I assume? I can't find many ioctls for that. But that's also all I'm getting, so there must be something I'm supposed to do with that fd? Help! :/ Regards -- Pierre Ossman Software Development Cendio AB https://cendio.com Teknikringen 8 https://twitter.com/ThinLinc 583 30 Linköping https://facebook.com/ThinLinc Phone: +46-13-214600 A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing?