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Date:   Thu, 29 Jun 2023 08:31:00 +0800
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Subject: Re: [PATCH v1 00/10] variable-order, large folios for anonymous
 memory
Content-Language: en-US
To:     Yu Zhao <yuzhao@google.com>
CC:     Ryan Roberts <ryan.roberts@arm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        David Hildenbrand <david@redhat.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
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        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>, <linux-kernel@vger.kernel.org>,
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From:   Yin Fengwei <fengwei.yin@intel.com>
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On 6/29/23 08:27, Yu Zhao wrote:
> On Wed, Jun 28, 2023 at 5:59 PM Yin Fengwei <fengwei.yin@intel.com> wrote:
>>
>> Hi Yu,
>>
>> On 6/29/23 02:22, Yu Zhao wrote:
>>> And please make sure it's disabled by default, because we are still
>>> missing many important functions, e.g., I don't think we can mlock()
>>> when large() && !pmd_mappable(), see mlock_pte_range() and
>>> mlock_vma_folio(). We can fix it along with many things later, but we
>>> need to present a plan and a schedule now. Otherwise, there would be
>>> pushback if we try to land the series without supporting mlock().
>>>
>>> Do you or Fengwei plan to take on it? (I personally don't.) If not,
>> Do you mean the mlock() with large folio? Yes. I can work on it. Thanks.
> 
> Great. Thanks!
> 
> Other places that have the similar problem but are probably easier to
> fix than the mlock() case:
> * madvise_cold_or_pageout_pte_range()
This one was on my radar. :). 

Regards
Yin, Fengwei

> * shrink_folio_list()