linux-kernel - Re: [PATCH v2] kpageflags: respect folio head-page flag placement

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Message-ID: <059593a8-aa30-475f-9de6-35e7136c1759@huawei.com>
Date:   Thu, 9 Nov 2023 17:05:38 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Gregory Price <gregory.price@...verge.com>
CC:     Matthew Wilcox <willy@...radead.org>,
        Gregory Price <gourry.memverge@...il.com>,
        <linux-mm@...ck.org>, <akpm@...ux-foundation.org>,
        <david@...hat.com>, <vbabka@...e.cz>, <naoya.horiguchi@...ux.dev>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] kpageflags: respect folio head-page flag placement



On 2023/11/9 7:33, Gregory Price wrote:
> On Wed, Nov 08, 2023 at 10:01:19AM +0800, Kefeng Wang wrote:
>>
>> Yes, I see your "Node Weights and Weighted Interleave", this is an
>> interesting topic, we need some easy and efficient way to use tiered
>> memory.
>>
> 
> There will be an LPC talk on it next week in the CXL track, presented
> by another group that's been testing it.  Please tune in!

Sure.

> 
>>>
>>> There's only a handful, so yeah the best way is probably to go ahead and
>>> swap k = page->flags for k = *folio_flags(folio, 0) and then handle the
>>> couple of outliars.
>>
>> If you don't mind, I maybe try to convert it in my changes.
>>
> 
> Please feel free! I am happy to help test, CC me on subsequent patches
> please!

Will do, thanks.
> 
> ~Gregory