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Message-ID: <ac3eb2510902190341y7eb4e938nf5f28ac094a68818@mail.gmail.com> Date: Thu, 19 Feb 2009 12:41:02 +0100 From: Kay Sievers <kay.sievers@...y.org> To: Rusty Russell <rusty@...tcorp.com.au> Cc: Andreas Robinson <andr345@...il.com>, sam@...nborg.org, linux-kernel@...r.kernel.org, Jon Masters <jonathan@...masters.org> Subject: Re: [RFC PATCH 0/6] module, kbuild: Faster boot with custom kernel. On Thu, Feb 19, 2009 at 12:15, Rusty Russell <rusty@...tcorp.com.au> wrote: > On Thursday 19 February 2009 00:27:58 Kay Sievers wrote: >> some modules wait for 200-500 milliseconds to >> get the lock released, some larger modules spend 50 milliseconds in >> load_module(), many of them around 20 milliseconds. > > OK, this is an untested hack (don't try unloading modules, not sure symbol > resolution isn't racy now I've killed the lock). Does it change the numbers? That changes it dramatically. The numbers from the sycall until the linked-in module are now down to 15-25 milliseconds, and for a few large modules 50-100. (One crazy exception is ipv6, which takes 620 milliseconds to link, no idea what it needs to do.) I'll compare a few bootup times with and without the patch, and come back later today with the real numbers. Thanks a lot, Kay -- 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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