Re: [PATCH 1/5] mm: add PSI accounting around ->read_folio and ->readahead calls

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To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH 1/5] mm: add PSI accounting around ->read_folio and ->readahead calls
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 12 Sep 2022 10:33:53 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Chris Mason <clm@xxxxxx>, Josef Bacik <josef@xxxxxxxxxxxxxx>, David Sterba <dsterba@xxxxxxxx>, Gao Xiang <xiang@xxxxxxxxxx>, Chao Yu <chao@xxxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-erofs@xxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <YxzW2wZzhaDvjS1c@casper.infradead.org>
User-agent: Mutt/1.5.17 (2007-11-01)

On Sat, Sep 10, 2022 at 07:26:35PM +0100, Matthew Wilcox wrote:
> I don't have time to look at this properly right now (about to catch a
> bus to the plane), but I think this should be |=, not =?

Yes.

References:
- improve pagecache PSI annotations
  - From: Christoph Hellwig
- [PATCH 1/5] mm: add PSI accounting around ->read_folio and ->readahead calls
  - From: Christoph Hellwig
- Re: [PATCH 1/5] mm: add PSI accounting around ->read_folio and ->readahead calls
  - From: Matthew Wilcox

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