8000 Add a vm allocator · Issue #523 · torokernel/torokernel · GitHub
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Add a vm allocator #523

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Open
1 of 6 tasks
MatiasVara opened this issue Apr 12, 2023 · 0 comments
Open
1 of 6 tasks

Add a vm allocator #523

MatiasVara opened this issue Apr 12, 2023 · 0 comments
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@MatiasVara
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enhancement feature This label identifies items that need work on. They should go to Backlog.

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@MatiasVara
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MatiasVara commented Apr 12, 2023 •
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A vm allocator shall enable to create continuous memory regions by relying on paging. Currently, paging is only used to have a flat memory space, i.e., virtual memory and physical memory is mapped 1-to-1. The vma region may be at a high address region. The page directory is shared among all cores. It is set during booting time and it never touched again.

  • To check if current allocator returns page-aligned memory when asking for a PAGE_SIZE
    - Current allocator does not return page-aligned chunks when asking for a PAGE_SIZE
  • To add a page allocator that works only on PAGE_SIZE chunks
  • To build a simple POC to check paging is working as expected
  • The chunks that are initiated for each must be aligned to PAGE_SIZE
  • To review how ToroOS allocates pages.
    - ToroOS uses an stack to keep free pages. The stack is stored in the page itself. When a free page is required, we
    invoke pop_free_page(), then, push_free_page() is used to push a free page on top of the stack.
  • To add make current kernel heap to work on the page allocator.
@MatiasVara MatiasVara self-assigned this Apr 12, 2023
@MatiasVara MatiasVara added 5390 enhancement feature This label identifies items that need work on. They should go to Backlog. labels Apr 12, 2023
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