Hidetoshi Seto wrote: > If stop_machine() invoked while one of onlined cpu is locked up > by some reason, stop_machine cannot finish its work because the > locked cpu cannot stop. This means all other healthy cpus > will be blocked infinitely by one dead cpu. > > This patch allows stop_machine to return -EBUSY with some printk > messages if any of stop_machine's threads cannot start running on > its target cpu in time. You can enable this timeout via sysctl. > > v4: > - move extern into linux/stop_machine.h and add include of the > header to kernel/sysctl.c. Now stopmachine_timeout is available > only on smp. > > v3: > - set stopmachine_timeout default to 0 (= never timeout) > > v2: > - remove fix for warning since it will be fixed upcoming typesafe > patches > - make stopmachine_timeout from secs to msecs > - allow disabling timeout by setting the stopmachine_timeout to 0 > > Signed-off-by: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx> > --- > include/linux/stop_machine.h | 3 ++ > kernel/stop_machine.c | 54 +++++++++++++++++++++++++++++++++++++++-- > kernel/sysctl.c | 12 +++++++++ > 3 files changed, 66 insertions(+), 3 deletions(-) Looks good to me. Ack. Max _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
