rust: Add kvmalloc() allocator type #643
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The current global allocator is for `kmalloc()` family of functions. Usually this is fine, but if we try to allocate a large structure on the heap, `kmalloc()` might fail because there is not enough contiguous memory available left in the system. There is currently no way to use a different allocator if you know you will need a large allocation but don't necessarily need it to be contiguous memory. This is the motivation for this commit. This commit adds the `KernelVirtualAllocator` type that implements the `Allocator` trait for kvmalloc() family of functions. Signed-off-by: Daniel Xu <[email protected]>
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superseded by #807? |
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I think #807 still requires allocations to be contiguous in physical memory. |
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The current global allocator is for
kmalloc()family of functions.Usually this is fine, but if we try to allocate a large structure on the
heap,
kmalloc()might fail because there is not enough contiguousmemory available left in the system.
There is currently no way to use a different allocator if you know you
will need a large allocation but don't necessarily need it to be
contiguous memory. This is the motivation for this commit.
This commit adds the
KernelVirtualAllocatortype that implements theAllocatortrait for kvmalloc() family of functions.Signed-off-by: Daniel Xu [email protected]