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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-08 03:38:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-08 03:38:17 +0300
commit1a86fc754fc2bae3be5fe00c1b553b91ba20e089 (patch)
treef5568e55bebc40461a012f27391670978b777a2b /fs
parenta7d4026834f8263a8a4eabeb753e3747988ef0d2 (diff)
parent961ae1d83d055a4b9ebbfb4cc8ca62ec1a7a3b74 (diff)
downloadlinux-1a86fc754fc2bae3be5fe00c1b553b91ba20e089.tar.xz
Merge tag 'gfs2-4.13.fixes.addendum' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull GFS2 fix from Bob Peterson: "Sorry for the additional merge request, but Andreas discovered this problem soon after you processed our last gfs2 merge. This fixes a regression introduced by a patch we did in mid-2015 (commit 88ffbf3e037e: "GFS2: Use resizable hash table for glocks"), so best to get it fixed. Some code was reverted that should not have been. The patch from Andreas Gruenbacher just re-adds code that had been there originally" * tag 'gfs2-4.13.fixes.addendum' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Fix glock rhashtable rcu bug
Diffstat (limited to 'fs')
-rw-r--r--fs/gfs2/glock.c11
-rw-r--r--fs/gfs2/incore.h1
2 files changed, 10 insertions, 2 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 6cd71c50b8bd..c38ab6c81898 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -80,9 +80,9 @@ static struct rhashtable_params ht_parms = {
static struct rhashtable gl_hash_table;
-void gfs2_glock_free(struct gfs2_glock *gl)
+static void gfs2_glock_dealloc(struct rcu_head *rcu)
{
- struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
+ struct gfs2_glock *gl = container_of(rcu, struct gfs2_glock, gl_rcu);
if (gl->gl_ops->go_flags & GLOF_ASPACE) {
kmem_cache_free(gfs2_glock_aspace_cachep, gl);
@@ -90,6 +90,13 @@ void gfs2_glock_free(struct gfs2_glock *gl)
kfree(gl->gl_lksb.sb_lvbptr);
kmem_cache_free(gfs2_glock_cachep, gl);
}
+}
+
+void gfs2_glock_free(struct gfs2_glock *gl)
+{
+ struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
+
+ call_rcu(&gl->gl_rcu, gfs2_glock_dealloc);
if (atomic_dec_and_test(&sdp->sd_glock_disposal))
wake_up(&sdp->sd_glock_wait);
}
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 790e73984288..73fce76e67ee 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -373,6 +373,7 @@ struct gfs2_glock {
loff_t end;
} gl_vm;
};
+ struct rcu_head gl_rcu;
struct rhash_head gl_node;
};