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authorAndreas Gruenbacher <agruenba@redhat.com>2017-06-30 07:47:15 -0500
committerBob Peterson <rpeterso@redhat.com>2017-07-05 07:20:24 -0500
commit4fd1a5795214bc6405f14691c1344ae8c3f17215 (patch)
treeac0d1a48b243c6e27b40460503bc99290fa3c564 /fs/gfs2/inode.c
parent722f6f62a563108dc0f311bd86120b8fbfa0c6df (diff)
gfs2: Get rid of flush_delayed_work in gfs2_evict_inode
So far, gfs2_evict_inode clears gl->gl_object and then flushes the glock work queue to make sure that inode glops which dereference gl->gl_object have finished running before the inode is destroyed. However, flushing the work queue may do more work than needed, and in particular, it may call into DLM, which we want to avoid here. Use a bit lock (GIF_GLOP_PENDING) to synchronize between the inode glops and gfs2_evict_inode instead to get rid of the flushing. In addition, flush the work queues of existing glocks before reusing them for new inodes to get those glocks into a known state: the glock state engine currently doesn't handle glock re-appropriation correctly. (We may be able to fix the glock state engine instead later.) Based on a patch by Steven Whitehouse <swhiteho@redhat.com>. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 9f605ea4810c..912d4e66fabc 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -144,7 +144,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
if (unlikely(error))
goto fail;
- ip->i_gl->gl_object = ip;
+ flush_delayed_work(&ip->i_gl->gl_work);
+ glock_set_object(ip->i_gl, ip);
error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
if (unlikely(error))
@@ -173,8 +174,8 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (unlikely(error))
goto fail_put;
-
- ip->i_iopen_gh.gh_gl->gl_object = ip;
+ flush_delayed_work(&ip->i_iopen_gh.gh_gl->gl_work);
+ glock_set_object(ip->i_iopen_gh.gh_gl, ip);
gfs2_glock_put(io_gl);
io_gl = NULL;