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Message-Id: <1156500893.2984.70.camel@pmac.infradead.org> Date: Fri, 25 Aug 2006 11:14:53 +0100 From: David Woodhouse <dwmw2@...radead.org> To: Sam Ravnborg <sam@...nborg.org> Cc: Jan Engelhardt <jengelh@...ux01.gwdg.de>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 0/4] Compile kernel with -fwhole-program --combine On Fri, 2006-08-25 at 09:26 +0200, Sam Ravnborg wrote: > And this discussion is btw. mood. If the general opinion is that we shall > include the -combine support all the kbuild infrastructure will anyway > be redone. > There are several small things that are not addressed in todays > implementation and that will be fixed one way or the other. There's a few _big_ things that aren't addressed in my makefile hack either. It's very much a proof of concept. However, if we limit the use of --combine to files within the same directory, the modifications to the kbuild infrastructure shouldn't be too intrusive. I strongly suspect that files within the same directory are where the majority of the benefit is anyway. Whole-kernel optimisation is likely to be prohibitively expensive, and can wait for LTO¹. -- dwmw2 ¹ http://www.gelato.org/pdf/apr2006/gelato_ICE06apr_lto_mitchell_codesourcery.pdf - 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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