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Date:   Mon, 18 Sep 2023 11:32:03 -0700
From:   Luis Chamberlain <mcgrof@kernel.org>
To:     Matthew Wilcox <willy@infradead.org>
Cc:     Pankaj Raghav <kernel@pankajraghav.com>, linux-xfs@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, p.raghav@samsung.com,
        david@fromorbit.com, da.gomez@samsung.com,
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        djwong@kernel.org, linux-mm@kvack.org, chandan.babu@oracle.com,
        gost.dev@samsung.com
Subject: Re: [RFC 07/23] filemap: align the index to mapping_min_order in
 __filemap_add_folio()
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References: <20230915183848.1018717-1-kernel@pankajraghav.com>
 <20230915183848.1018717-8-kernel@pankajraghav.com>
 <ZQS1GyfwqJXstRQA@casper.infradead.org>
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On Fri, Sep 15, 2023 at 08:48:43PM +0100, Matthew Wilcox wrote:
> On Fri, Sep 15, 2023 at 08:38:32PM +0200, Pankaj Raghav wrote:
> > From: Luis Chamberlain <mcgrof@kernel.org>
> > 
> > Align the index to the mapping_min_order number of pages while setting
> > the XA_STATE and xas_set_order().
> 
> Not sure why this one's necessary either.  The index should already be
> aligned to folio_order.

Oh, it was not obvious, would a VM_BUG_ON_FOLIO() be OK then?

> Some bits of it are clearly needed, like checking that folio_order() >=
> min_order.

Thanks,

  Luis