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Date: Sat, 12 Sep 2015 10:11:20 +0200 From: Ingo Molnar <mingo@...nel.org> To: Peter Zijlstra <peterz@...radead.org> Cc: linux-kernel@...r.kernel.org, vincent.weaver@...ne.edu, acme@...nel.org, eranian@...gle.com, jolsa@...hat.com, alexander.shishkin@...ux.intel.com Subject: Re: [RFC][PATCH 2/3] perf: Fix u16 overflows * Peter Zijlstra <peterz@...radead.org> wrote: > Vince reported that its possible to overflow the various size fields > and get weird stuff if you stick too many events in a group. > > Put a lid on this by requiring the fixed record size not exceed 16k. > This is still a fair amount of events (silly amount really) and leaves > plenty room for callchains and stack dwarves while also avoiding > overflowing the u16 variables. Does this leave a natural ABI extension route here, in case in the future it becomes a problem? We should take aside a value to mean 'larger record' or such? Could we list exactly which fields this concerns, in which structures? Thanks, Ingo -- 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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