Hi Michal, Michal Koutný <mkoutny@xxxxxxxx> 于2021年9月18日周六 上午12:41写道： > > Hello Hao. > > On Thu, Sep 16, 2021 at 09:53:55PM +0800, Hao Sun <sunhao.th@xxxxxxxxx> wrote: > > KCSAN reported the following data race during the kernel booting when > > using Healer to fuzz the latest Linux kernel. > > [...] > > cgroup_rstat_cpu_pop_updated kernel/cgroup/rstat.c:139 [inline] > > [...] > > cgroup_rstat_updated+0x53/0x1b0 kernel/cgroup/rstat.c:38 > > FWIW, it's a "safe" race between updaters and flushers (possibly > missing the latest update(s)). This is expected as explained in > cgroup_rstat_updated() comment. > Would it be better to add a `data_race` macro to the corresponding location so that the false report can be disabled? See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/memory-model/Documentation/access-marking.txt#n58 for more details. Currently, fuzzer can not test the kernel with KCSAN enabled for a long time, because cgroups setup is the basic step before executing any test case. Regards Hao
