linux-kernel - Re: [PATCH 04/11] mm: add PG

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Message-ID: <wi3n3k26uizgm3hhbz4qxi6k342e5gxprtvqpzdqftekutfy65@3usaz63baobt>
Date: Fri, 20 Dec 2024 13:08:39 +0200
From: "Kirill A. Shutemov" <kirill@...temov.name>
To: Jens Axboe <axboe@...nel.dk>
Cc: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, hannes@...xchg.org, 
	clm@...a.com, linux-kernel@...r.kernel.org, willy@...radead.org, 
	bfoster@...hat.com, David Hildenbrand <david@...hat.com>, 
	Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH 04/11] mm: add PG_dropbehind folio flag

On Fri, Dec 13, 2024 at 08:55:18AM -0700, Jens Axboe wrote:
> Add a folio flag that file IO can use to indicate that the cached IO
> being done should be dropped from the page cache upon completion.
> 
> Signed-off-by: Jens Axboe <axboe@...nel.dk>

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

+ David, Vlastimil.

I think we should consider converting existing folio_set_reclaim() /
SetPageReclaim() users to the new flag. From a quick scan, all of them
would benefit from dropping the page after writeback is complete instead
of leaving the folio on the LRU.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov