On 2013/01/16 22:35, Serge Hallyn wrote: > Quoting Gao feng (gaofeng@xxxxxxxxxxxxxx): >> From: gaofeng <gaofeng@xxxxxxxxxxxxxx> >> >> Since the memory used by tmpfs is under control of >> memory cgroup. and the files under the tmpfs will not >> be leak to other tmpfs. >> >> So mounting tmpfs in user namespace does no harm to the >> host,we can allow tmpfs to be mounted in user namespace. >> >> Signed-off-by: gaofeng <gaofeng@xxxxxxxxxxxxxx> > > I've got the same patch in my kernel at > http://kernel.ubuntu.com/git?p=serge/quantal-userns.git;a=summary > > except note that there are two definitions of shmem_fs_type. > Yes, I miss the other one,Do you have plan to push this patch into linus's linux-2.6 or eric's userns tree? I'm trying to add userns support for libvirt,so I need tmpfs to be allowed to mount in userns. Thanks! >> --- >> mm/shmem.c | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/mm/shmem.c b/mm/shmem.c >> index 5dd56f6..8eff60a 100644 >> --- a/mm/shmem.c >> +++ b/mm/shmem.c >> @@ -2766,6 +2766,7 @@ static struct file_system_type shmem_fs_type = { >> .name = "tmpfs", >> .mount = shmem_mount, >> .kill_sb = kill_litter_super, >> + .fs_flags = FS_USERNS_MOUNT, >> }; >> >> int __init shmem_init(void) >> -- >> 1.7.11.7 >> > _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
