Dump struct page array?

DISCUSSION Phillip Susi 2 participants 3 messages Jun 5, 2014 Memory management

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Phillip Susi

author

2014-06-05 15:30 UTC #0 lore raw

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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. -----BEGIN PGP SIGNATURE-----
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Konstantin Khlebnikov

2014-06-05 15:56 UTC #1 lore raw

Quoted 6 lines · 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.

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

Quoted 13 lines

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Quoted 5 lines

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Phillip Susi

author

2014-06-05 19:33 UTC #2 lore raw

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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 <[email protected]> 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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