On Wed, Nov 27, 2013 at 8:13 AM, Oleg Nesterov <oleg@xxxxxxxxxx> wrote:
> To all: sorry for noise, I can't comment this patch.
>
>
> But Eric, could you please help me to understand? I am totally confused.
>
> So, afaics, initially (even after MS_KERNMOUNT) fs_fully_visible("proc")
> should return false.
>
> After the normal "mout -t proc none /proc/" it becomes true.
>
> And it is still true after, say, "mount -t ramfs none /proc/sys" because
> "ls -ld /proc/sys" shows ->i_nlink == 1.
Grr. mount -t ramfs none /proc/sys should make proc be not "fully visible".
--Andy
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