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| Started by | zhong jiang <zhongjiang@huawei.com> |
|---|---|
| First post | 2016-08-04 06:10 +0200 |
| Last post | 2016-08-04 11:20 +0200 |
| Articles | 2 — 2 participants |
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A question about transparent hugepages zhong jiang <zhongjiang@huawei.com> - 2016-08-04 06:10 +0200
Re: A question about transparent hugepages "Kirill A. Shutemov" <kirill@shutemov.name> - 2016-08-04 11:20 +0200
| From | zhong jiang <zhongjiang@huawei.com> |
|---|---|
| Date | 2016-08-04 06:10 +0200 |
| Subject | A question about transparent hugepages |
| Message-ID | <s2i8N-3PY-1@gated-at.bofh.it> |
according to the total_mapcount, Different process can map any subpages of the transparent hugepages. How it can happen to ?
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| From | "Kirill A. Shutemov" <kirill@shutemov.name> |
|---|---|
| Date | 2016-08-04 11:20 +0200 |
| Message-ID | <s2mYN-6W6-9@gated-at.bofh.it> |
| In reply to | #1456145 |
On Thu, Aug 04, 2016 at 12:02:29PM +0800, zhong jiang wrote: > according to the total_mapcount, Different process can map any subpages of the > transparent hugepages. How it can happen to ? For anonymous memory it can only happen over copy-on-write via fork() + munmap() or something in one of the processes. Now we have tmpfs/shmem with huge pages in mainline. In this case you can map any subpage directly from file. -- Kirill A. Shutemov
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