Groups > linux.kernel > #1328259 > unrolled thread

Have some confusion about the pfn_valid() ?

Started by	zhong jiang <zhongjiang@huawei.com>
First post	2016-02-06 09:20 +0100
Last post	2016-02-06 09:20 +0100
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  Have some confusion about the pfn_valid() ? zhong jiang <zhongjiang@huawei.com> - 2016-02-06 09:20 +0100

#1328259 — Have some confusion about the pfn_valid() ?

From	zhong jiang <zhongjiang@huawei.com>
Date	2016-02-06 09:20 +0100
Subject	Have some confusion about the pfn_valid() ?
Message-ID	<qZ6g2-4yb-5@gated-at.bofh.it>


Hi

In my opinion, pfn_valid() is meant to be able to tell if a given PFN has valid
section, and That section can contain corresponding mem_map. but, the section can
be has holes, the corresponding mem_map also be allcoated, resulting in treating
the PFN as valid incorrect.

what's problem for the interpretation of the above?

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Have some confusion about the pfn_valid() ?

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#1328259 — Have some confusion about the pfn_valid() ?