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They use a ring buffer and are >> specially made to work in such situations. > > We are anyways sending a trace event with data, but can trace event be > a wake up source for an application (like a tracer) ? This DRM event > is just to indicate that reset happened, so app has to read from trace > file. Yeah, that's a really good question I can't fully answer. As far as I know you can filter in userspace what you get from the tracer, but I don't know if you can block on a specific event. Christian. > >> >> Alternative would be to audit the udev code and allow giving a GFP >> mask to the function to make sure that we don't run into the deadlock. >> >> Another alternative is a debugfs file which just blocks for the next >> reset to happen. >> > > - Shashank > >> Regards, >> Christian. >> >>> Regards, >>> >>> S.Amarnath >>> >>