linux-kernel - Re: arm32: panic in move_freepages (Was [PATCH v2 0/4] arm64: drop pfn_valid_within() and simplify pfn

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Message-ID: <6ad2956c-70ae-c423-ed7d-88e94c88060f@huawei.com>
Date:   Thu, 29 Apr 2021 08:48:26 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Mike Rapoport <rppt@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        David Hildenbrand <david@...hat.com>,
        Marc Zyngier <maz@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        "Will Deacon" <will@...nel.org>, <kvmarm@...ts.cs.columbia.edu>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: arm32: panic in move_freepages (Was [PATCH v2 0/4] arm64: drop
 pfn_valid_within() and simplify pfn_valid())


On 2021/4/28 13:59, Mike Rapoport wrote:
> On Tue, Apr 27, 2021 at 07:08:59PM +0800, Kefeng Wang wrote:
>> On 2021/4/27 14:23, Mike Rapoport wrote:
>>> On Mon, Apr 26, 2021 at 11:26:38PM +0800, Kefeng Wang wrote:
>>>> On 2021/4/26 13:20, Mike Rapoport wrote:
>>>>> On Sun, Apr 25, 2021 at 03:51:56PM +0800, Kefeng Wang wrote:
>>>>>> On 2021/4/25 15:19, Mike Rapoport wrote:
>>>>>>
>>>>>>        On Fri, Apr 23, 2021 at 04:11:16PM +0800, Kefeng Wang wrote:
>>>>>>
>>>>>>            I tested this patchset(plus arm32 change, like arm64 does)
>>>>>>            based on lts 5.10，add some debug log, the useful info shows
>>>>>>            below, if we enable HOLES_IN_ZONE, no panic, any idea,
>>>>>>            thanks.
>>>>>>
>>>>>>        Are there any changes on top of 5.10 except for pfn_valid() patch?
>>>>>>        Do you see this panic on 5.10 without the changes?
>>>>>>
>>>>>> Yes, there are some BSP support for arm board based on 5.10,
>>> Is it possible to test 5.12?
> Do you use SPARSMEM? If yes, what is your section size?
> What is the value if CONFIG_FORCE_MAX_ZONEORDER in your configuration?

Yes,

CONFIG_SPARSEMEM=y

CONFIG_SPARSEMEM_STATIC=y

CONFIG_FORCE_MAX_ZONEORDER = 11

CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HAVE_ARCH_PFN_VALID=y
CONFIG_HIGHMEM=y
#define SECTION_SIZE_BITS    26
#define MAX_PHYSADDR_BITS    32
#define MAX_PHYSMEM_BITS     32


>