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> allocating kernel objects from proper virtual memory makes this easier. Linux currently just allocates kernel objects straight out of the linear mapping of al
by altairprime 1y ago
> allocating kernel objects from proper virtual memory makes this easier. Linux currently just allocates kernel objects straight out of the linear mapping of all physical memory
I found this to be a key takeaway of reading the full thread: this is, in part, a benchmark of kernel memory allocation approaches, that surfaces an unforeseen difference in FD performance at a mere 256 x 2 allocs. Presumably we’re seeing a test case distilled down from a real world scenario where this slowdown was traced for some reason?