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Date: Tue, 5 Aug 2014 17:07:28 -0400 From: "Frank Ch. Eigler" <fche@...hat.com> To: Josh Boyer <jwboyer@...oraproject.org> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Jakub Jelinek <jakub@...hat.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, stable <stable@...r.kernel.org>, Michel Dänzer <michel@...nzer.net>, Markus Trippelsdorf <markus@...ppelsdorf.de>, Josh Stone <jistone@...hat.com> Subject: Re: [PATCH 3.15 33/37] Fix gcc-4.9.0 miscompilation of load_balance() in scheduler Hi - > >>. I don't disagree it should be > >> disabled by default, but making it unconditional is going to force the > >> distributions that care about perf, systemtap, and debuggers to > >> manually revert this. > > > > Bah. I bet I use 'perf' more than most, and it doesn't care about > > debug info. Actually, "perf probe" does (via HAVE_DWARF_SUPPORT), to place probes and to extract variables at those probes, much as systemtap does. Without var-tracking, probes placed at most interior points of functions will make variables inaccessible. Do you need a fully worked out example to see this? - FChE -- 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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