On Fri, May 19, 2023 at 08:20:44AM -0700, Ira Weiny wrote: > Davidlohr Bueso wrote: > > On Fri, 19 May 2023, LiuLele wrote: > > > > >In my testing CXL device /sys/bus/cxl/devices/mem0 not created, and the get error messages : > > > > > >``` > > >cxl_pci 0000:0d:00.0: Failed to get interrupt for event Info log > > >``` > > > > > >My test environment is a qemu CXL emulator with qemu v8.0.0, Linux kernel v6.3.0. > > >While with kernel 5.9.13, /sys/bus/cxl/devices/mem0 can be created. > > > > Yes, this can be annoying and would argue the probe should not error out. > > I had to double check. Events are mandatory on devices. On checking > again interrupt support is mandatory as well. So that is why I errored > out here. The failure essentially creates a user visible regression whereas booting an older kernel fixes it. It is not a friendly error message when testing kernels / upgrading / test environments. The only thing I can think of is if a new kconfig symbol is introduced so to make such cases a bit more clearer for now as things get settled. Otherwise for testing this creates a few cycles of just noise. And I'd imagine even a few developer hours. Luis
