Messages in this thread | | | From | "Prakhya, Sai Praneeth" <> | Subject | RE: [PATCH] efi: Free existing memory map before installing new memory map | Date | Wed, 27 Jun 2018 07:28:01 +0000 |
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> > Also, could you please clarify if there is any specific reason why > > memory allocated using memblock_reserve() shouldn't be freed. I mean, > > not with memblock_free() but I think we could make it _available_ > > using free_bootmem() (or something similar, please correct me if this is not > the right API). > > On arm64, the memory map is provided to the core kernel by the stub, and after > kexec, a pointer to the same memory map will be passed to the next kernel. So > the kernel does not 'own' that allocation, and it should not free it or overwrite > it.
Thanks for the reply. It confirms that the issue is only on x86 systems. I see that arm64 doesn't call efi_memmap_alloc() and hence there is no concept of allocating memory for new memory map and installing it (so no memory leak).
Regards, Sai
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