More problems in setup_pcpu_remap()

[David Miller]

The way this code is currently designed, it can exhaust all of the
VMALLOC address space on both x86 and x86_64, and then some.

It allocates PMD_SIZE * num_possible_cpus() of vmalloc space.

PMD_SIZE is 2MB, num_possible_cpus() can be up to 4096....
which can easily exceed (VMALLOC_END - VMALLOC_START)

Initially I had set out to implement sparc64 support for the new
per-cpu stuff, but it looks like I'm stuck finding bugs in the x86
implementation instead :-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/