Peter Zijlstra <pet...@infradead.org> writes: > On Mon, Oct 13, 2014 at 04:45:35PM +0300, Alexander Shishkin wrote: >> + /* >> + * Nesting is not supported for AUX area, make sure nested >> + * writers are caught early >> + */ >> + if (WARN_ON_ONCE(local_xchg(&rb->aux_nest, 1))) >> + goto err_put; > > Note that printk() from NMI is prone to making your machine die, not > that I have a better option though.
Indeed, but if your driver is really attempting nested perf_aux_output_begin()s, then you had it coming to you anyway. Regards, -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
