Re: [PATCH 6/9] XArray: internal node is a xa_node when it is bigger than XA_ZERO_ENTRY

Wei Yang
2020-03-30T13:45:23Z

On Mon, Mar 30, 2020 at 05:50:06AM -0700, Matthew Wilcox wrote:
>On Mon, Mar 30, 2020 at 12:36:40PM +0000, Wei Yang wrote:
>> As the comment mentioned, we reserved several ranges of internal node
>> for tree maintenance, 0-62, 256, 257. This means a node bigger than
>> XA_ZERO_ENTRY is a normal node.
>>
>> The checked on XA_ZERO_ENTRY seems to be more meaningful.
>
>257-1023 are also reserved, they just aren't used yet. XA_ZERO_ENTRY
>is not guaranteed to be the largest reserved entry.

Then why we choose 4096?

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Wei Yang
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