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From: Balbir Singh <bsingharora@gmail.com>
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>,
	linuxppc-dev@lists.ozlabs.org
Cc: mikey@neuling.org, oohall@gmail.com, aneesh.kumar@linux.vnet.ibm.com
Subject: Re: [RFC 4/7] powerpc/mm: Set MAX_ZONE_PFN to 0 for all zones beyond TOP_ZONE
Date: Tue, 3 May 2016 18:13:22 +1000	[thread overview]
Message-ID: <57285DA2.7040404@gmail.com> (raw)
In-Reply-To: <1462256966-19321-5-git-send-email-khandual@linux.vnet.ibm.com>



On 03/05/16 16:29, Anshuman Khandual wrote:
> From: Oliver O'Halloran <oohall@gmail.com>
> 
> All the memory zones past TOP_ZONE are managed by generic mm code. Zone
> max PFN should be set to 0 instead of ~0UL since that's what the generic
> mm code expects. Without this, kernel assigns all pages into ZONE_DEVICE
> zone which is not part of buddy allocator, hence kernel cannot allocate
> any memory and even fails to boot.
> 
> Signed-off-by: Oliver O'Halloran <oohall@gmail.com>

Reviewed-by: Balbir Singh <bsingharora@gmail.com>

  reply	other threads:[~2016-05-03  8:13 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-03  6:29 [RFC 0/7] Enable ZONE_DEVICE on POWER Anshuman Khandual
2016-05-03  6:29 ` [RFC 1/7] powerpc/mm: Make vmemmap_populate accommodate ZONE_DEVICE memory Anshuman Khandual
2016-05-03  8:04   ` Balbir Singh
2016-05-03  8:25     ` Anshuman Khandual
2016-05-03  6:29 ` [RFC 2/7] powerpc/mm: Enable support for ZONE_DEVICE on PPC_BOOK3S_64 platforms Anshuman Khandual
2016-05-03  6:29 ` [RFC 3/7] powerpc/mm: Define TOP_ZONE as a constant Anshuman Khandual
2016-05-03  8:12   ` Balbir Singh
2016-05-03  6:29 ` [RFC 4/7] powerpc/mm: Set MAX_ZONE_PFN to 0 for all zones beyond TOP_ZONE Anshuman Khandual
2016-05-03  8:13   ` Balbir Singh [this message]
2016-05-03  6:29 ` [RFC 5/7] mm/memremap: Export pfn_first, pfn_end, find_pagemap functions Anshuman Khandual
2016-05-03  6:29 ` [RFC 6/7] TEST: Reserve system memory to be emulated as device memory Anshuman Khandual
2016-05-03  6:29 ` [RFC 7/7] TEST: Driver to test device memory through ZONE_DEVICE Anshuman Khandual
2016-05-03  8:21   ` Balbir Singh

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