Messages in this thread | | | Date | Tue, 15 Aug 2006 12:59:47 -0400 | From | Dave Jones <> | Subject | Re: [PATCH for review] [140/145] i386: mark cpu_dev structures as __cpuinitdata |
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On Tue, Aug 15, 2006 at 09:43:23AM +0200, Arjan van de Ven wrote: > On Tue, 2006-08-15 at 02:46 -0400, Chuck Ebbert wrote: > > In-Reply-To: <1155518783.5764.10.camel@localhost> > > > > On Mon, 14 Aug 2006 10:26:23 +0900, Magnus Damm wrote: > > > > > > > The different cpu_dev structures are all used from __cpuinit callers what > > > > > I can tell. So mark them as __cpuinitdata instead of __initdata. I am a > > > > > little bit unsure about arch/i386/common.c:default_cpu, especially when it > > > > > comes to the purpose of this_cpu. > > > > > > > > But none of these CPUs supports hotplug and only one (AMD) does SMP. > > > > So this is just wasting space in the kernel at runtime. > > > > > > How could this be wasting space? If you compile with CONFIG_HOTPLUG_CPU > > > disabled then __cpuinitdata will become __initdata - ie the same as > > > before. Not a single byte wasted what I can tell. > > > > I was talking about wasted space with HOTPLUG_CPU enabled, of course. > > Nobody is ever going to hotplug a VIA, Cyrix, Geode, etc. CPU, yet your > > patch makes the kernel carry that code and data anyway. > > remember that suspend uses software hot(un)plug as well...
Only for non-boot CPUs. The vendors above (with exception of VIA) never made SMP systems.
Dave -- http://www.codemonkey.org.uk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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