On 2020/01/29 21:25, Qian Cai wrote: > > >> On Jan 29, 2020, at 7:13 AM, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote: >> >> By the way, can READ_ONCE()/WRITE_ONCE() really solve this warning? >> The link above says read/write on the same location ( mm/page_counter.c:129 ). >> I don't know how READ_ONCE()/WRITE_ONCE() can solve the race. > > That looks like a different one where it complains about c->failcnt++. I’ll send a separate patch for that. > Ah, then this patch is meant for mm/page_counter.c:138 versus page_counter.c:139 race which was closed as invalid at https://syzkaller.appspot.com/bug?id=871391ec080746185a2dd437c54d75fcd1ef0ef8 .
