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Date: Thu, 1 Apr 2010 09:46:47 +1030 From: Rusty Russell <rusty@...tcorp.com.au> To: Yinghai Lu <yinghai@...nel.org> Cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] x86: Make e820_remove_range to handle all covered case On Tue, 30 Mar 2010 04:08:29 pm Yinghai Lu wrote: > > Rusty found on lguest with trim_bios_range, max_pfn is not right anymore, and > looks e820_remove_range does not work right. > > [ 0.000000] BIOS-provided physical RAM map: > [ 0.000000] LGUEST: 0000000000000000 - 0000000004000000 (usable) > [ 0.000000] Notice: NX (Execute Disable) protection missing in CPU or disabled in BIOS! > [ 0.000000] DMI not present or invalid. > [ 0.000000] last_pfn = 0x3fa0 max_arch_pfn = 0x100000 > [ 0.000000] init_memory_mapping: 0000000000000000-0000000003fa0000 > > root cause is: the e820_remove_range doesn't handle that all cover case. > e820_remove_range(BIOS_START, BIOS_END - BIOS_start, ,,) > get miss one left range. > > Make that is corresponding to e820_update_range() to handle that case too. Tested-by: Rusty Russell <rusty@...tcorp.com.au> Please put in -urgent... Thanks, Rusty. -- 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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