Hi Geoff, On 03/06/16 19:13, Geoff Levand wrote: > From: James Morse <james.morse at arm.com> > > kernel/smp.c has a fancy counter that keeps track of the number of CPUs > it marked as not-present and left in cpu_park_loop(). If there are any > CPUs spinning in here, kexec will release them once the memory is re-used > by the new kernel. > > We can't return an error once we reach machine_kexec(), so as a sanity check > we forbid kexec images to be loaded if there are already cpus stuck in the > kernel, or we have multiple cpus and no way of disabling them. > > Signed-off-by: James Morse <james.morse at arm.com> > [Split off from a larger patch] > Signed-off-by: Geoff Levand <geoff at infradead.org> Post-split, the second paragraph of the commit message is out of place, and doesn't describe what the patch does. Can I suggest replacing it with: > Provide a function to expose whether this counter is non-zero, so we can use > this when loading a new kexec image, and when calling machine_kexec(). Thanks, James
