Here's a second version of the patch (now a patch set) to eliminate rhashtable_walk_peek in gfs2.
The first patch introduces lockref_put_not_zero, the inverse of lockref_get_not_zero. The second patch eliminates rhashtable_walk_peek in gfs2. In gfs2_glock_iter_next, the new lockref function from patch one is used to drop a lockref count as long as the count doesn't drop to zero. This is almost always the case; if there is a risk of dropping the last reference, we must defer that to a work queue because dropping the last reference may sleep. Thanks, Andreas Andreas Gruenbacher (2): lockref: Add lockref_put_not_zero gfs2: Stop using rhashtable_walk_peek fs/gfs2/glock.c | 47 ++++++++++++++++++++++++++++------------------- include/linux/lockref.h | 1 + lib/lockref.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 57 insertions(+), 19 deletions(-) -- 2.14.3
