Jiri Kosina <[email protected]> writes: > On Wed, 15 Nov 2017, Miroslav Benes wrote: >> Live patching consistency model is of LEAVE_PATCHED_SET and >> SWITCH_THREAD. This means that all tasks in the system have to be marked >> one by one as safe to call a new patched function. Safe means when a >> task is not (sleeping) in a set of patched functions. That is, no >> patched function is on the task's stack. Another clearly safe place is >> the boundary between kernel and userspace. The patching waits for all >> tasks to get outside of the patched set or to cross the boundary. The >> transition is completed afterwards. ... >> >> Signed-off-by: Miroslav Benes <[email protected]> >> Cc: Oleg Nesterov <[email protected]> >> Cc: Michael Ellerman <[email protected]> >> Cc: Thomas Gleixner <[email protected]> >> Cc: Ingo Molnar <[email protected]> >> Cc: "H. Peter Anvin" <[email protected]> >> Cc: Andy Lutomirski <[email protected]> >> Cc: [email protected] >> Cc: [email protected] >> --- >> Documentation/ABI/testing/sysfs-kernel-livepatch | 12 +++++++ >> Documentation/livepatch/livepatch.txt | 11 +++++-- >> arch/powerpc/kernel/signal.c | 6 ++-- >> arch/x86/entry/common.c | 6 ++-- >> kernel/livepatch/core.c | 30 +++++++++++++++++ >> kernel/livepatch/transition.c | 41 >> ++++++++++++++++++++++++ >> kernel/livepatch/transition.h | 1 + >> kernel/signal.c | 4 ++- > > I'd like to be queuing this patchset for the next merge window, so if > there are any objections for the out-of-kernel/livepatch/* changes, please > speak up now.
The powerpc changes look innocuous and in-line with the change log, no objection from me. Have an ack if you like: Acked-by: Michael Ellerman <[email protected]> (powerpc) cheers
