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Message-ID: <20100115195811.GB1345@ucw.cz> Date: Fri, 15 Jan 2010 21:00:37 +0100 From: Pavel Machek <pavel@....cz> To: Dimitrios Apostolou <jimis@....net> Cc: Arjan van de Ven <arjan@...radead.org>, Alex Chiang <achiang@...com>, Len Brown <lenb@...nel.org>, Bjorn Helgaas <bjorn.helgaas@...com>, Andrew Morton <akpm@...ux-foundation.org>, Yinghai Lu <yinghai@...nel.org>, linux-kernel@...r.kernel.org Subject: -O0 kernel Re: High cpu temperature with 2.6.32, bisection shows commit 69d258 (fwd) > BTW, how can I remove that irritating -O2 flag? I 'm used to compiling > with -O0 my debug builds in userland, because compilation is *many times* > faster. I should be really useful for bisections. Actually, figuring out kernel flags for fastest kernel compilation would be nice. Nice for bisect, and nice for slow machines. Zaurus needs 4 hours to compile kernel, kohjinsha cca 1.5 hours. -O0 may not fly, as inlining is needed... some tests are neccessary. Now that we support icc, gcc -O0 should be doable, too... ...ok, so I tried -O0. -O2 compilation took 1250seconds, -O0 took 1167seconds and failed. is there some fast compiler around that could be used? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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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