Jan Kiszka wrote: > Gilles Chanteperdrix wrote: >> Jan Kiszka wrote: >>> Hi Gilles, >>> >>> trying to understand the cb_read/write lock usage, some question came up >>> here: What prevents that the mutexq iteration in pse51_mutex_check_init >>> races against pse51_mutex_destroy_internal? >>> >>> If nothing, then I wonder if we actually have to iterate over the whole >>> queue to find out whether a given object has been initialized and >>> registered already or not. Can't this be encoded differently? >> We actually iterate over the queue only if the magic happens to be >> correct, which is not the common case. > > However, there remains a race window with other threads removing other > mutex objects in parallel, changing the queue - risking a kernel oops. > And that is what worries me. It's unlikely. but possible. It's unclean.
Ok. This used to be protected by the nklock. We should add the nklock again. -- Gilles. _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core