Messages in this thread | | | Subject | Re: [PATCH -next] mm/hotplug: skip bad PFNs from pfn_to_online_page() | From | "Aneesh Kumar K.V" <> | Date | Fri, 14 Jun 2019 22:25:18 +0530 |
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On 6/14/19 10:06 PM, Dan Williams wrote: > On Fri, Jun 14, 2019 at 9:26 AM Aneesh Kumar K.V > <aneesh.kumar@linux.ibm.com> wrote:
>> Why not let the arch >> arch decide the SUBSECTION_SHIFT and default to one subsection per >> section if arch is not enabled to work with subsection. > > Because that keeps the implementation from ever reaching a point where > a namespace might be able to be moved from one arch to another. If we > can squash these arch differences then we can have a common tool to > initialize namespaces outside of the kernel. The one wrinkle is > device-dax that wants to enforce the mapping size,
The fsdax have a much bigger issue right? The file system block size is the same as PAGE_SIZE and we can't make it portable across archs that support different PAGE_SIZE?
-aneesh
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