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description/memory: vmalloc

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@@ -707,8 +707,7 @@ vmalloc 分配的内存并不是内核预先分配好的, 而是需要动态分
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| 2008/07/28 | Nick Piggin <npiggin@suse.de> | [mm: vmap rewrite](https://lwn.net/Articles/304188) | 重写 vmap 分配器, 当前关注的是引入了红黑树组织的 vmap_area 后, 使用 vmap_area_lock 来保护. | RFC ☑ 2.6.28-rc1 | [PatchWork](https://lore.kernel.org/patchwork/cover/118352)<br>*-*-*-*-*-*-*-* <br>[PatchWork](https://lore.kernel.org/patchwork/patch/124065), [commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=db64fe02258f1507e13fe5212a989922323685ce) |
| 2013/03/13 | Joonsoo Kim <iamjoonsoo.kim@lge.com> | [remove vm_struct list management](https://lore.kernel.org/patchwork/cover/365284) | 在 vmalloc 初始化后, 不再使用旧的 vmlist 链表管理方式. 使用由 vmap_area 组织成的 vmap_area_list 管理. | v2 ☑ 3.10-rc1 | [PatchWork v2,0/8](https://lore.kernel.org/patchwork/cover/365284)<br>*-*-*-*-*-*-*-* <br>[关注 commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4341fa454796b8a37efd5db98112524e85e7114e) |
| 2019/10/22 | Uladzislau Rezki (Sony) <urezki@gmail.com> | [remove vm_struct list management](https://lore.kernel.org/patchwork/cover/1143029) | NA | v1 ☑ 5.5-rc1 | [PatchWork v2,0/8](https://patchwork.kernel.org/project/linux-mm/patch/20191022155800.20468-1-urezki@gmail.com)<br>*-*-*-*-*-*-*-* <br>[commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e36176be1c3920a487681e37158849b9f50189c4) |
| 2019/10/22 | Uladzislau Rezki (Sony) <urezki@gmail.com> | [remove vm_struct list management](https://lore.kernel.org/patchwork/cover/1143029) | 随着 5.2 版本 [improve vmap allocation](https://lore.kernel.org/patchwork/cover/1059021) 的合入, 全局的 vmap_area_lock 可以被拆分成两个锁: 一个用于分配部分(vmap_area_lock), 另一个用于回收(free_vmap_area_lock), 因为有两个不同的实体: "空闲数据结构"和"繁忙数据结构". 这和那后的减少锁争用, 允许在不同的 CPU 上并行执行"空闲"和"忙碌"树的操作. 但是需要注意的是, 分配/释放操作仍然存在依赖. 如果在不同的 CPU 上同时运行, 分配/释放操作仍然会相互干扰. | v1 ☑ 5.5-rc1 | [PatchWork v2,0/8](https://patchwork.kernel.org/project/linux-mm/patch/20191022155800.20468-1-urezki@gmail.com)<br>*-*-*-*-*-*-*-* <br>[commit](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e36176be1c3920a487681e37158849b9f50189c4) |