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SubjectRe: [PATCH v2] mm: thp: update split_queue_len correctly
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

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