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Date: Thu, 14 Jan 2010 00:52:14 +0100 From: Andi Kleen <andi@...stfloor.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Yinghai Lu <yinghai@...nel.org>, Suresh Siddha <suresh.b.siddha@...el.com>, Andi Kleen <andi@...stfloor.org>, Linus Torvalds <torvalds@...ux-foundation.org>, "ananth@...ibm.com" <ananth@...ibm.com>, Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH -v2 5/5] x86: use dmi check to treat disabled cpus as hotplug cpus. > I just built an allyesconfig kernel, and it has 1904K of percpu data. > 1791K of that is in per_cpu__cpu_lock_stats. So everything else is Ok so we need to fix lock stats, I'll put it on my todo list. > ~113K. Still. We should not be restricted from doing legitimately > large percpu allocations because of ghost cpus (and Tejun knows my > position on this), but it doesn't sound like the house is burning, either. I think it's legitimate to require explicit allocation on add/remove event for anything large. Static per cpu is really only for "lazy users" anyways. -Andi -- ak@...ux.intel.com -- Speaking for myself only. -- 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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