linux-kernel - Re: [PATCH v6 03/11] device-dax/kmem: move resource tracking to drvdata

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Message-ID: <82beb6ec-b6c0-47ff-d02d-b823436ba08a@redhat.com>
Date:   Tue, 6 Oct 2020 10:14:07 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Dan Williams <dan.j.williams@...el.com>, akpm@...ux-foundation.org
Cc:     Vishal Verma <vishal.l.verma@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Brice Goglin <Brice.Goglin@...ia.fr>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>, Jia He <justin.he@....com>,
        Joao Martins <joao.m.martins@...cle.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org
Subject: Re: [PATCH v6 03/11] device-dax/kmem: move resource tracking to
 drvdata

On 06.10.20 08:55, Dan Williams wrote:
> Towards removing the mode specific @dax_kmem_res attribute from the
> generic 'struct dev_dax', and preparing for multi-range support, move
> resource tracking to driver data.  The memory for the resource name
> needs to have its own lifetime separate from the device bind lifetime
> for cases where the driver is unbound, but the kmem range could not be
> unplugged from the page allocator.
> 
> The resource reservation also needs to be released manually via
> release_resource() given the awkward manipulation of the
> IORESOURCE_BUSY flag.
> 
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Vishal Verma <vishal.l.verma@...el.com>
> Cc: Dave Hansen <dave.hansen@...ux.intel.com>
> Cc: Pavel Tatashin <pasha.tatashin@...een.com>
> Cc: Brice Goglin <Brice.Goglin@...ia.fr>
> Cc: Dave Jiang <dave.jiang@...el.com>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Ira Weiny <ira.weiny@...el.com>
> Cc: Jia He <justin.he@....com>
> Cc: Joao Martins <joao.m.martins@...cle.com>
> Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>

Reviewed-by: David Hildenbrand <david@...hat.com>

Thanks!


-- 
Thanks,

David / dhildenb