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Date: Mon, 18 Mar 2013 13:59:29 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Stephane Eranian <eranian@...gle.com> Cc: linux-kernel@...r.kernel.org, mingo@...e.hu, jolsa@...hat.com, fweisbec@...il.com Subject: Re: [PATCH] perf: fix ring_buffer perf_output_space() boundary calculation On Mon, 2013-03-18 at 13:48 +0100, Stephane Eranian wrote: > if (!rb->writable) > - return true; > + return false; writable means user writable (VM_WRITE); the difference is that a !VM_WRITE buffer will simply over-write its own tail whereas a VM_WRITE buffer will drop events. So returning true for !VM_WRITE makes sense, there's always space. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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