On Fri, Mar 18, 2011 at 07:59:08PM +0900, Tetsuo Handa wrote: > I established steps to reproduce. > > On a 2.6.38 kernel built with CONFIG_SMP=y running on an SMP machine, run > > while :; do newns /sbin/pivot_root /proc/ /proc/sys/; done > > on one terminal and run > > while :; do /bin/ls -l /proc/*/exe; done > > on another terminal. (The "newns" is a program that unshares the mnt namespace > before execve() using CLONE_NEWNS.) > > Below patch releases/reacquires vfsmount_lock when rescheduling is required. > --- > fs/dcache.c | 15 ++++++++++++++- > fs/namespace.c | 6 ++++++ > include/linux/sched.h | 2 ++ > include/linux/seqlock.h | 4 ++++ > 4 files changed, 26 insertions(+), 1 deletion(-) That's incredibly ugly. I agree that the deadlock exists and needs to be dealt with, but not that way. _Strongly_ NAKed. I'll see what I can come up with, but that variant is not an option. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
