Hello, Li. On Thu, Jun 28, 2012 at 02:07:51PM +0800, Li Zefan wrote: > > Hmm... fa980ca87d "cgroup: superblock can't be released with active > > dentries" is supposed to have fixed that. Looking into it. > > > > > I think I know what happened here: > > umount > deativate_super(sb) > dput(subdir) > subdir->d_count-- > d_release(subdir) > deactivate_super(sb) > shrink_dcache_for_umount(sb) > BUG(root->d_count)!! > root->d_count-- Can you please elaborate a bit? I'm not really following? Where does the last root->d_count-- come from? > I use this script to reproduce the bug: > > mount -t cgroup -o cpu xxx /mnt > mkdir /mnt/sub > sleep 100 < /mnt/sub & > kill $! > wait $! > rmdir /mnt/sub > umount /mnt Unfortunately, this doesn't reproduce the bug here either. :( Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
