On Wed, 2 Nov 2022 11:24:20 -0300 Jason Gunthorpe <jgg@xxxxxxxx> wrote: > No, it doesn't muck with preemption, it will have some sleeping lock, > eg mlx5_ib_query_pkey() does a memory allocation as the first thing > > It seems like a bug that calling kmalloc(GFP_KERNEL)/might_sleep() > from within a tracepoint doesn't trigger a warning? Has nothing to do with tracepoints. You could call it a bug that it doesn't trigger a warning when preemption is disabled. But then again, it would if you enabled DEBUG_PREEMPT and possibly LOCKDEP too. So, I chalk this up to a lack of proper testing. -- Steve
