lkml.org 
[lkml]   [2021]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Arm64 crash while reading memory sysfs
From
Date


On 5/28/21 10:43 AM, Mike Rapoport wrote:
> On Thu, May 27, 2021 at 03:56:44PM -0700, Andrew Morton wrote:
>> On Thu, 27 May 2021 18:50:48 +0100 Catalin Marinas <catalin.marinas@arm.com> wrote:
>>
>>>> Can you please try Anshuman's patch "arm64/mm: Drop HAVE_ARCH_PFN_VALID":
>>>>
>>>> https://lore.kernel.org/lkml/1621947349-25421-1-git-send-email-anshuman.khandual@arm.com
>>>>
>>>> It seems to me that the check for memblock_is_memory() in
>>>> arm64::pfn_valid() is what makes init_unavailable_range() to bail out for
>>>> section parts that are not actually populated and then we have
>>>> VM_BUG_ON_PAGE(PagePoisoned(p)) for these pages.
>>>
>>> I acked Anshuman's patch, I think they all need to go in together.
>>
>> That's neat. Specifically which patches are we referring to here?
>
> arm64: drop pfn_valid_within() and simplify pfn_valid():
> https://lore.kernel.org/lkml/20210511100550.28178-5-rppt@kernel.org
>
> arm64/mm: Drop HAVE_ARCH_PFN_VALID:
> https://lore.kernel.org/lkml/1621947349-25421-1-git-send-email-anshuman.khandual@arm.com

I dont see the above patch (which drops HAVE_ARCH_PFN_VALID on arm64) on linux-next
i.e. next-20210607. I might have missed some earlier context here but do not we want
to fallback on generic pfn_valid() after Mike's series ?

\
 
 \ /
  Last update: 2021-06-08 09:07    [W:1.150 / U:0.228 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site