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From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Shakeel Butt <shakeelb@google.com>
Cc: David Hildenbrand <david@redhat.com>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Yang Shi <shy828301@gmail.com>, Zi Yan <ziy@nvidia.com>,
	Matthew Wilcox <willy@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] mm: thp: update split_queue_len correctly
Date: Wed, 24 Nov 2021 23:12:38 +0300	[thread overview]
Message-ID: <20211124201238.3xzpy2b5zcv7j23s@box.shutemov.name> (raw)
In-Reply-To: <20211123190916.1738458-1-shakeelb@google.com>

On Tue, Nov 23, 2021 at 11:09:16AM -0800, Shakeel Butt wrote:
> The deferred THPs are split on memory pressure through shrinker
> callback and splitting of THP during reclaim can fail for several
> reasons like unable to lock the THP, under writeback or unexpected
> number of pins on the THP. Such pages are put back on the deferred split
> list for consideration later. However kernel does not update the
> deferred queue size on putting back the pages whose split was failed.
> This patch fixes that.

Hm. No. split_huge_page_to_list() updates the queue size on split success.

NAK.

-- 
 Kirill A. Shutemov

  parent reply	other threads:[~2021-11-24 20:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-23 19:09 Shakeel Butt
2021-11-23 20:00 ` Yang Shi
2021-11-24 20:12 ` Kirill A. Shutemov [this message]
2021-11-24 20:44   ` Shakeel Butt
2021-11-24 21:17     ` Yang Shi
2021-11-24 21:19       ` Shakeel Butt

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