linux-kernel - Re: [PATCH v2] list_lru: expand list_lru

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Message-Id: <E28CA72B-109F-4457-9234-7FF6C6C29C47@linux.dev>
Date: Tue, 3 Dec 2024 11:40:19 +0800
From: Muchun Song <muchun.song@...ux.dev>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Dave Chinner <david@...morbit.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Matthew Wilcox <willy@...radead.org>,
 Johannes Weiner <hannes@...xchg.org>,
 Nhat Pham <nphamcs@...il.com>,
 Qi Zheng <zhengqi.arch@...edance.com>,
 Roman Gushchin <roman.gushchin@...ux.dev>,
 Michal Hocko <mhocko@...nel.org>,
 Shakeel Butt <shakeel.butt@...ux.dev>,
 linux-mm@...ck.org,
 cgroups@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 Dave Chinner <dchinner@...hat.com>
Subject: Re: [PATCH v2] list_lru: expand list_lru_add() docs with info about
 sublists



> On Nov 29, 2024, at 22:58, Alice Ryhl <aliceryhl@...gle.com> wrote:
> 
> The documentation for list_lru_add() and list_lru_del() has not been
> updated since lru lists were originally introduced by commit
> a38e40824844 ("list: add a new LRU list type"). Back then, list_lru
> stored all of the items in a single list, but the implementation has
> since been expanded to use many sublists internally.
> 
> Thus, update the docs to mention that the requirements about not using
> the item with several lists at the same time also applies not using
> different sublists. Also mention that list_lru items are reparented when
> the memcg is deleted as discussed on the LKML [1].
> 
> Also fix incorrect use of 'Return value:' which should be 'Return:'.
> 
> Link: https://lore.kernel.org/all/Z0eXrllVhRI9Ag5b@dread.disaster.area/ [1]
> Reviewed-by: Dave Chinner <dchinner@...hat.com>
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>

Acked-by: Muchun Song <muchun.song@...ux.dev>

Thanks.