On 7/26/19 7:45 PM, Waiman Long wrote: > It was found that a dying mm_struct where the owning task has exited can > stay on as active_mm of kernel threads as long as no other user tasks > run on those CPUs that use it as active_mm. This prolongs the life time > of dying mm holding up memory and other resources that cannot be freed. > > Fix that by forcing the kernel threads to use init_mm as the active_mm > if the previous active_mm is dying. > > Signed-off-by: Waiman Long <longman@xxxxxxxxxx> > --- > kernel/sched/core.c | 13 +++++++++++-- > mm/init-mm.c | 2 ++ > 2 files changed, 13 insertions(+), 2 deletions(-) Sorry, I didn't realize that mm->owner depends on CONFIG_MEMCG. I will need to refresh the patch and send out v2 when I am done testing. Cheers, Longman
