linux-kernel - Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio

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Message-ID: <YYoz7FPK/vHdsV2Z@infradead.org>
Date:   Tue, 9 Nov 2021 00:40:12 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     "Darrick J . Wong " <djwong@...nel.org>, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio

On Mon, Nov 08, 2021 at 04:05:25AM +0000, Matthew Wilcox (Oracle) wrote:
> These functions are wrappers around zero_user_segments(), which means
> that zero_user_segments() can now be called for compound pages even when
> CONFIG_TRANSPARENT_HUGEPAGE is disabled.

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>

Related note: the inline !HIGHMEM version should switch to page_address
instead of kmap_local_page to make the code more obvious.