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Date:   Mon, 3 Apr 2023 17:41:45 +0300
From:   "Kirill A. Shutemov" <kirill@shutemov.name>
To:     Vlastimil Babka <vbabka@suse.cz>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Borislav Petkov <bp@alien8.de>,
        Andy Lutomirski <luto@kernel.org>,
        Sean Christopherson <seanjc@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Joerg Roedel <jroedel@suse.de>,
        Ard Biesheuvel <ardb@kernel.org>,
        Andi Kleen <ak@linux.intel.com>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        David Rientjes <rientjes@google.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
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        linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCHv9 04/14] mm/page_alloc: Add sysfs handle to accept
 accept_memory
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References: <20230330114956.20342-1-kirill.shutemov@linux.intel.com>
 <20230330114956.20342-5-kirill.shutemov@linux.intel.com>
 <4c319a60-c1fb-fe43-65be-9729f0261dab@suse.cz>
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On Mon, Apr 03, 2023 at 03:43:32PM +0200, Vlastimil Babka wrote:
> On 3/30/23 13:49, Kirill A. Shutemov wrote:
> > Write amount of memory to accept into the new sysfs handle
> > /sys/kernel/mm/page_alloc/accept_memory.
> > 
> > Write 'all' to the handle to accept all memory in the system.
> > 
> > It can be used to implement background memory accepting from userspace.
> > It is also useful for debugging.
> > 
> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> 
> Somewhat similarly to patch 3, I'd think we don't need this patch in
> mainline without clear usecases first, although it's good to post for
> testing/debugging.

I thought about it as a way to implement #3 from 02/14 commit message:
users who want to accept all memory in background can use the mechanism.

But, again, we can leave out until later.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov