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author | Steven Whitehouse <swhiteho@redhat.com> | 2011-01-19 09:30:01 +0000 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-01-21 09:39:08 +0000 |
commit | bc015cb84129eb1451913cfebece270bf7a39e0f (patch) | |
tree | 4f116a61b802d87ae80051e9ae05d8fcb73d9ae7 /fs/gfs2/acl.c | |
parent | 2b1caf6ed7b888c95a1909d343799672731651a5 (diff) | |
download | linux-bc015cb84129eb1451913cfebece270bf7a39e0f.tar.bz2 |
GFS2: Use RCU for glock hash table
This has a number of advantages:
- Reduces contention on the hash table lock
- Makes the code smaller and simpler
- Should speed up glock dumps when under load
- Removes ref count changing in examine_bucket
- No longer need hash chain lock in glock_put() in common case
There are some further changes which this enables and which
we may do in the future. One is to look at using SLAB_RCU,
and another is to look at using a per-cpu counter for the
per-sb glock counter, since that is touched twice in the
lifetime of each glock (but only used at umount time).
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'fs/gfs2/acl.c')
0 files changed, 0 insertions, 0 deletions