Dump struct page array?

Dump struct page array?

[Phillip Susi]

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Is there a way to dump the struct page array or perhaps even a tool to analyze it?  I would like to get a map of what pages are in use, or in particular, where all of the unmovable pages are.
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Re: Dump struct page array?

[Konstantin Khlebnikov]

On Thu, Jun 5, 2014 at 7:30 PM, Phillip Susi <psusi@ubuntu.com> wrote:
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> Hash: SHA1
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> Is there a way to dump the struct page array or perhaps even a tool to
> analyze it?  I would like to get a map of what pages are in use, or in
> particular, where all of the unmovable pages are.

Have you seen "page-types"? tools/vm/page-types.c in the kernel source tree.

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Re: Dump struct page array?

[Phillip Susi]

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On 6/5/2014 11:56 AM, Konstantin Khlebnikov wrote:
| On Thu, Jun 5, 2014 at 7:30 PM, Phillip Susi <psusi@ubuntu.com> wrote:
| Is there a way to dump the struct page array or perhaps even a tool to
| analyze it?  I would like to get a map of what pages are in use, or in
| particular, where all of the unmovable pages are.
|
|> Have you seen "page-types"? tools/vm/page-types.c in the kernel source tree.

Thanks, that is very interesting... I noticed that there are no reserved pages.  There *must* be some pages marked as reserved for the bios somewhere right?  Also how do you tell what pages are free or allocated to the kernel?  It seems that free pages sometimes have the buddy bit set and sometimes not, and pages used by the slab cache sometimes have the slab bit set, and sometimes not.

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