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Message-ID: <51A5648C.3060900@zytor.com> Date: Tue, 28 May 2013 19:14:36 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Yinghai Lu <yinghai@...nel.org> CC: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>, Yuanhan Liu <yuanhan.liu@...ux.intel.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] x86: Fix adjust_range_size_mask calling position On 05/28/2013 04:43 PM, Yinghai Lu wrote: >> >> Sorry, I'm not sure I understand what the above paragraph is trying to say. > > We merge the continuous range with same page size allow too early. > in the case > [mem 0x00200000-0x3fffffff] page 2M > [mem 0x40000000-0x7bffffff] page 2M > after merging them, will get > [mem 0x00200000-0x7bffffff] page 2M > even we can use 1G page to map > [mem 0x40000000-0x7bffffff] > > that will cause problem, because we map > [mem 0x7fe00000-0x7fffffff] page 1G > [mem 0x7c000000-0x7fdfffff] page 1G > with 1G page. > > so need to adjust page size at first before merge > [mem 0x00200000-0x3fffffff] page 2M > [mem 0x40000000-0x7bffffff] page 2M > What I meant with that is please update the description so someone uninitiated can follow the description, either now or in 5-10 years. -hpa -- 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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