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description/memory: vmap_pfn

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gatieme
2021-07-14 23:03:24 +08:00
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study/kernel/00-DESCRIPTION/MEMORY_MANAGER.md
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@@ -747,24 +747,24 @@ Date: Thu Mar 17 14:17:49 2016 -0700
#### 2.3.1.5 vread/vwrite
#### 2.3.1.5 other vmalloc interface
-------
对于 vread
vread 用于读取指定地址的内存数据.
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 1993/12/28 | Linus Torvalds <torvalds@linuxfoundation.org> | [Linux-0.99.14 (November 28, 1993)](https://elixir.bootlin.com/linux/0.99.14/source/mm/vmalloc.c#L168) | 引入 vread. | ☑ 0.99.14 | [HISTORY commit](https://github.com/gatieme/linux-history/commit/7e8425884852b83354ab090a07715c6c32918f37) |
对于 vwrite
vwrite 则用于对指定的 vmalloc 区域进行写操作.
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| NA | Marc Boucher | [Support /dev/kmem access to vmalloc space (Marc Boucher)](https://elixir.bootlin.com/linux/2.4.17/source/mm/vmalloc.c#L168) | 引入 vwrite | ☑ 2.4.17 | [HISTORY commit](https://github.com/gatieme/linux-history/commit/a3245879f664fb42b1903bc98af670da6d783db5) |
| 2021/05/06 | David Hildenbrand <david@redhat.com> | [mm/vmalloc: remove vwrite()](https://lore.kernel.org/patchwork/cover/1401594) | 删除 vwrite | v1 ☑ 5.13-rc1 | [PatchWork v1,3/3](https://lore.kernel.org/patchwork/cover/1401594)<br>*-*-*-*-*-*-*-* <br>[commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f7c8ce44ebb113b83135ada6e496db33d8a535e3) |
对于 vmalloc_to_page helper
vmalloc_to_page 则提供了通过 vmalloc 地址查找到对应 page 的操作.
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
@@ -774,6 +774,7 @@ Date: Thu Mar 17 14:17:49 2016 -0700
| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2007/05/04 | Jeremy Fitzhardinge <jeremy@goop.org> | [xen: Xen implementation for paravirt_ops](https://lore.kernel.org/patchwork/patch/80500) | NA | ☑ 2.6.22-rc1 | [PatchWork 0/11](https://lore.kernel.org/patchwork/cover/80500), [关注 commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=aee16b3cee2746880e40945a9b5bff4f309cfbc4) |
| 2020/10/02 | Christoph Hellwig <hch@lst.de> | [mm: remove alloc_vm_area and add a vmap_pfn function](https://lore.kernel.org/patchwork/patch/1316291) | NA | ☑ 5.10-rc1 | [PatchWork 0/11](https://lore.kernel.org/patchwork/cover/1316291) |