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Date: Mon, 8 Dec 2014 02:12:26 -0800 From: tip-bot for Xishi Qiu <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: tglx@...utronix.de, hpa@...or.com, mingo@...nel.org, linux-kernel@...r.kernel.org, qiuxishi@...wei.com, riel@...hat.com, linux-mm@...ck.org, dave@...1.net Subject: [tip:x86/mm] x86/mm: Fix zone ranges boot printout Commit-ID: 5f9f7a56565c3f44b0a4b2966414e09048dddcf7 Gitweb: http://git.kernel.org/tip/5f9f7a56565c3f44b0a4b2966414e09048dddcf7 Author: Xishi Qiu <qiuxishi@...wei.com> AuthorDate: Thu, 4 Dec 2014 15:50:00 +0800 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Mon, 8 Dec 2014 11:05:41 +0100 x86/mm: Fix zone ranges boot printout This is the usual physical memory layout boot printout: ... [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] [ 0.000000] Normal [mem 0x100000000-0xc3fffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x00099fff] [ 0.000000] node 0: [mem 0x00100000-0xbf78ffff] [ 0.000000] node 0: [mem 0x100000000-0x63fffffff] [ 0.000000] node 1: [mem 0x640000000-0xc3fffffff] ... This is the log when we set "mem=2G" on the boot cmdline: ... [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] // should be 0x7fffffff, right? [ 0.000000] Normal empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x00099fff] [ 0.000000] node 0: [mem 0x00100000-0x7fffffff] ... This patch fixes the printout, the following log shows the right ranges: ... [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0x7fffffff] [ 0.000000] Normal empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x00099fff] [ 0.000000] node 0: [mem 0x00100000-0x7fffffff] ... Signed-off-by: Xishi Qiu <qiuxishi@...wei.com> Cc: Linux MM <linux-mm@...ck.org> Cc: Rik van Riel <riel@...hat.com> Cc: <dave@...1.net> Link: http://lkml.kernel.org/r/54801228.5030405@huawei.com Signed-off-by: Ingo Molnar <mingo@...nel.org> --- arch/x86/mm/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 82b41d5..a97ee08 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -703,10 +703,10 @@ void __init zone_sizes_init(void) memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); #ifdef CONFIG_ZONE_DMA - max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; + max_zone_pfns[ZONE_DMA] = min(MAX_DMA_PFN, max_low_pfn); #endif #ifdef CONFIG_ZONE_DMA32 - max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; + max_zone_pfns[ZONE_DMA32] = min(MAX_DMA32_PFN, max_low_pfn); #endif max_zone_pfns[ZONE_NORMAL] = max_low_pfn; #ifdef CONFIG_HIGHMEM -- 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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