Commit 513e2dae authored by Xue jiufei's avatar Xue jiufei Committed by Linus Torvalds

ocfs2: flush inode data to disk and free inode when i_count becomes zero

Disk inode deletion may be heavily delayed when one node unlink a file
after the same dentry is freed on another node(say N1) because of memory
shrink but inode is left in memory.  This inode can only be freed while
N1 doing the orphan scan work.

However, N1 may skip orphan scan for several times because other nodes
may do the work earlier.  In our tests, it may take 1 hour on 4 nodes
cluster and it hurts the user experience.  So we think the inode should
be freed after the data flushed to disk when i_count becomes zero to
avoid such circumstances.
Signed-off-by: default avatarJoyce.xue <xuejiufei@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Reviewed-by: default avatarMark Fasheh <mfasheh@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0f5e7b41
...@@ -1191,17 +1191,19 @@ void ocfs2_evict_inode(struct inode *inode) ...@@ -1191,17 +1191,19 @@ void ocfs2_evict_inode(struct inode *inode)
int ocfs2_drop_inode(struct inode *inode) int ocfs2_drop_inode(struct inode *inode)
{ {
struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_inode_info *oi = OCFS2_I(inode);
int res;
trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno, trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
inode->i_nlink, oi->ip_flags); inode->i_nlink, oi->ip_flags);
if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED) assert_spin_locked(&inode->i_lock);
res = 1; inode->i_state |= I_WILL_FREE;
else spin_unlock(&inode->i_lock);
res = generic_drop_inode(inode); write_inode_now(inode, 1);
spin_lock(&inode->i_lock);
WARN_ON(inode->i_state & I_NEW);
inode->i_state &= ~I_WILL_FREE;
return res; return 1;
} }
/* /*
......
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