On Sun, 2007-07-15 at 12:59 -0700, Andrew Morton wrote: > On Sun, 15 Jul 2007 21:21:03 +0200 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > Shows the current stacktrace where we violate the previously established > > locking order. > > yup, but the lock_page() which we did inside truncate_mutex was a > lock_page() against a different address_space: the blockdev mapping. > > So this is OK - we'll never take truncate_mutex against the blockdev > mapping (it doesn't have one, for a start ;)) > > This is similar to the quite common case where we take inode A's > i_mutex inside inode B's i_mutex, which needs special lockdep annotations. > > I think. I haven't looked into this in detail. Right, I can make lock_page classes per address space. Lets see if this one goes away. - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
