On Wed, Mar 4, 2015 at 5:09 PM, Zefan Li <lizefan@xxxxxxxxxx> wrote:
> Now we call ss->bind() in cgroup_init(), so cgroup_init() will
> call cpuset_bind() and then the latter will access top_cpuset's
> cpumask, which is NULL, because cpuset_init() is called after
> cgroup_init()
>
> The simplest fix is to swap cgroup_init() and cpuset_init().
>
> Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
> Fixes: 295458e67284 ("cgroup: call cgroup_subsys->bind on cgroup subsys initialization")
> Reported by: Ming Lei <tom.leiming@xxxxxxxxx>
> Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
Looks this patch does fix the boot issue.
> ---
> init/main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/init/main.c b/init/main.c
> index 61b9937..50d1e95 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -667,8 +667,8 @@ asmlinkage __visible void __init start_kernel(void)
> page_writeback_init();
> proc_root_init();
> nsfs_init();
> - cgroup_init();
> cpuset_init();
> + cgroup_init();
> taskstats_init_early();
> delayacct_init();
>
> --
> 1.8.0.2
>
Thanks
Ming Lei
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