On 2021-01-07 17:49:02 [+0100], To Sergei Poselenov wrote: > On 2020-12-30 14:09:17 [+0300], Sergei Poselenov wrote: > > Hello, > Hi, > > > We applied patch-5.4.47-rt28.patch to NXP 5.4.47-2.2.0 release ARM64 > > kernel running on IMX8M NANO chip, and enabled CONFIG_PRREMPT_RT. We > > are observing the following crash (below), on a system running an > > application that communicates with some SPI device. Obviously, the > > system doesn't crash without the patch applied. > > > > Any thoughts on the reason of the failure would be appreciated. How would we start debugging the problem? > > Can you give v5.10 a try v5.10 and/or enable SLUB_DEBUG? Now that I look at it again, you need update to more recent v5.4-RT kernel. The current is v5.4.84-rt47, the bug was fixed in v5.4.54-rt33. > > Thanks! > > > > Regards, > > Sergei Poselenov, > > Emcraft Systems > Sebastian
