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Date: Fri, 8 Mar 2013 11:01:12 -0800 From: Yinghai Lu <yinghai@...nel.org> To: David Vrabel <david.vrabel@...rix.com> Cc: linux-kernel@...r.kernel.org, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [PATCH] x86,mm: fix init_mem_mapping() when the first memory chunk is small On Fri, Mar 8, 2013 at 10:47 AM, David Vrabel <david.vrabel@...rix.com> wrote: > In init_mem_mapping(), if the first chunk of memory that is mapped is > small, there will not be enough mapped pages to allocate page table > pages for the next (larger) chunk. > > Estimate how many pages are used for the mappings so far and how many > are needed for a larger chunk, and only increase step_size if there > are enough free pages. > > This fixes a boot failure on a system where the first chunk of memory > mapped only had 3 pages in it. > > init_memory_mapping: [mem 0x00000000-0x000fffff] > init_memory_mapping: [mem 0x20d000000-0x20d002fff] > init_memory_mapping: [mem 0x20c000000-0x20cffffff] > Kernel panic - not syncing: alloc_low_page: can not alloc memory Can you check current linus tree? https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=98e7a989979b185f49e86ddaed2ad6890299d9f0 should fix the problem with your system. Thanks Yinghai -- 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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