On Sat, Sep 28, 2013 at 01:43:49PM -0700, Linus Torvalds wrote: > Sounds reasonable to to me. Sigh... Looks like there's a lot of fun in shrink_dcache_for_umount() - at the very least, it needs to bump ->d_seq on everything, because with that change we *can* walk into a filesystem in the middle of that. We obviously don't want to slap rcu_barrier() into the final mntput() - it's far too costly; even one in deactivate_locked_super() (in the wrong place and gone since a while back) had been causing problems. Moreover, any filesystem that has e.g. ->d_hash() use an object hanging off private data of superblock and freed by its ->kill_sb() before generic_shutdown_super() will have an additional set of PITA; there shouldn't be many of those, though. Oh, well - this is going to be a fun series, by the look of it... -- 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
