Re: Struct page proposal

To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Kent Overstreet <kent.overstreet@xxxxxxxxx>
Subject: Re: Struct page proposal
From: David Hildenbrand <david@xxxxxxxxxx>
Date: Mon, 27 Sep 2021 22:45:39 +0200
Cc: Vlastimil Babka <vbabka@xxxxxxx>, linux-fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "Darrick J. Wong" <djwong@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>
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On 27.09.21 20:34, Linus Torvalds wrote:

On Mon, Sep 27, 2021 at 10:54 AM Kent Overstreet
<kent.overstreet@xxxxxxxxx> wrote:


That list_head is the problematic one. Why do we need to be able to take a page
from the middle of a freelist?


At least for the merging with the buddy page case.

And alloc_contig_range(), page reporting, page poisioning ... andprobably more.


--
Thanks,

David / dhildenb

References:
- Struct page proposal
  - From: Kent Overstreet
- Re: Struct page proposal
  - From: Vlastimil Babka
- Re: Struct page proposal
  - From: Kent Overstreet
- Re: Struct page proposal
  - From: Linus Torvalds