On Fri, Feb 10, 2023 at 03:49:47PM +0000, Yafang Shao wrote: > The extra space which is used to store the obj_cgroup membership is only > valid when kmemcg is enabled. The kmemcg can be disabled via the kernel > parameter "cgroup.memory=nokmem" at runtime. > This helper is also used in non-memcg code, for example the tracepoint, > so we should fix it. > > It was found by code review when I was implementing bpf memory usage[1]. > No real issue happens in production environment. Probably not a stable material, but nice to have it fixed. Thanks! > > [1]. https://lwn.net/Articles/921991/ > > Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx> > Cc: Dennis Zhou <dennis@xxxxxxxxxx> > Cc: Tejun Heo <tj@xxxxxxxxxx> > Cc: Christoph Lameter <cl@xxxxxxxxx> > Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx> > Cc: Vasily Averin <vvs@xxxxxxxxxx> Reviewed-by: Roman Gushchin <roman.gushchin@xxxxxxxxx> Thanks!
