From: Henry C Chang <henry.cy.chang@gmail.com>
Date: Tue, 15 Mar 2011 09:18:02 +0000 (+0000)
Subject: ceph: add request to the tail of unsafe write list
X-Git-Tag: firefly_0821_release~7613^2~1616^2~12
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=49bcb93236ce1c60d9b7eb21a0aea1999f4d8709;p=firefly-linux-kernel-4.4.55.git

ceph: add request to the tail of unsafe write list

In sync_write_wait(), we assume that the newest request is at the
tail of unsafe write list. We should maintain the semantics here.

Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
---

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index db5d86309744..159b512d5a27 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -564,7 +564,8 @@ more:
 			 * start_request so that a tid has been assigned.
 			 */
 			spin_lock(&ci->i_unsafe_lock);
-			list_add(&req->r_unsafe_item, &ci->i_unsafe_writes);
+			list_add_tail(&req->r_unsafe_item,
+				      &ci->i_unsafe_writes);
 			spin_unlock(&ci->i_unsafe_lock);
 			ceph_get_cap_refs(ci, CEPH_CAP_FILE_WR);
 		}