linux-kernel - Re: [PATCH v5 15/17] device-dax: add an 'align' attribute

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Message-Id: <20200925192234.33ae92b75012c1f2bdd974b8@linux-foundation.org>
Date:   Fri, 25 Sep 2020 19:22:34 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Joao Martins <joao.m.martins@...cle.com>, vishal.l.verma@...el.com,
        dave.hansen@...ux.intel.com, linux-mm@...ck.org,
        linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 15/17] device-dax: add an 'align' attribute

On Fri, 25 Sep 2020 12:13:04 -0700 Dan Williams <dan.j.williams@...el.com> wrote:

> Introduce a device align attribute.  While doing so, rename the region
> align attribute to be more explicitly named as so, but keep it named as
> @align to retain the API for tools like daxctl.
> 
> Changes on align may not always be valid, when say certain mappings were
> created with 2M and then we switch to 1G.  So, we validate all ranges
> against the new value being attempted, post resizing.
> 
> Link: https://lkml.kernel.org/r/159643105944.4062302.3131761052969132784.stgit@dwillia2-desk3.amr.corp.intel.com
> Link: https://lore.kernel.org/r/20200716172913.19658-3-joao.m.martins@oracle.com
> Signed-off-by: Joao Martins <joao.m.martins@...cle.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
>

The signoff chain implies that this was From:Joao.  Please clarify?