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Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from removing the areas

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> On Apr 12, 2017, at 3:02 PM, Christoph Hellwig <hch@infradead.org> wrote:
> 
>> On Wed, Apr 12, 2017 at 02:01:59PM +0900, Hoeun Ryu wrote:
>> vm_area_add_early/vm_area_register_early() are used to reserve vmalloc area
>> during boot process and those virtually mapped areas are never unmapped.
>> So `OR` VM_STATIC flag to the areas in vmalloc_init() when importing
>> existing vmlist entries and prevent those areas from being removed from the
>> rbtree by accident.
> 
> How would they be removed "by accident"?

I don't mean actual use-cases, but I just want to make it robust against like programming errors.

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[PATCH] mm: add VM_STATIC flag to vmalloc and prevent from removing the areas Hoeun Ryu <hoeun.ryu@gmail.com> - 2017-04-12 07:10 +0200
  Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from  removing the areas Christoph Hellwig <hch@infradead.org> - 2017-04-12 08:10 +0200
    Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from removing the areas Hoeun Ryu <hoeun.ryu@gmail.com> - 2017-04-12 13:50 +0200
      Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from  removing the areas Christoph Hellwig <hch@infradead.org> - 2017-04-12 19:40 +0200
        Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from  removing the areas Ho-Eun Ryu <hoeun.ryu@gmail.com> - 2017-04-13 03:10 +0200
  Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from  removing the areas Anshuman Khandual <khandual@linux.vnet.ibm.com> - 2017-04-13 06:20 +0200
    Re: [PATCH] mm: add VM_STATIC flag to vmalloc and prevent from removing the areas Hoeun Ryu <hoeun.ryu@gmail.com> - 2017-04-14 02:30 +0200

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