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@@ -1465,7 +1465,14 @@ static void ceph_vmtruncate_work(struct work_struct *work)
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struct inode *inode = &ci->vfs_inode;
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dout("vmtruncate_work %p\n", inode);
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- mutex_lock(&inode->i_mutex);
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+ if (!mutex_trylock(&inode->i_mutex)) {
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+ /*
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+ * the i_mutex can be hold by a writer who is waiting for
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+ * caps. wake up waiters, they will do pending vmtruncate.
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+ */
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+ wake_up_all(&ci->i_cap_wq);
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+ mutex_lock(&inode->i_mutex);
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+ }
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__ceph_do_pending_vmtruncate(inode);
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mutex_unlock(&inode->i_mutex);
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iput(inode);
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