xfsdump: WARNING: could not get list of attributes for dir ino XXX: Cannot allocate memory (12)

Issue

Command

# xfsdump -L cf1 -M nas99d - /mnt/snapshot/clientfiles1 2>xfs-cf1-snap.err
      | ssh 10.67.152.46 "xfsrestore -L cf1 - /xfs/hostname1/ifs/production/ClientFiles1/"

The filesystem being dumped is 40TB.

When I view the file xfs-cf1-snap (stderr redirect) I see a lot of WARNINGS:

xfsdump: WARNING: could not get list of non-root attributes for dir ino 54161587869: Cannot allocate memory (12)
xfsdump: WARNING: could not get list of root attributes for dir ino 54338165092: Cannot allocate memory (12)
xfsdump: WARNING: could not get list of non-root attributes for dir ino 54342325593: Cannot allocate memory (12)
xfsdump: WARNING: could not get list of non-root attributes for dir ino 54433777130: Cannot allocate memory (12)
xfsdump: WARNING: could not get list of non-root attributes for dir ino 55843070863: Cannot allocate memory (12)
xfsdump: WARNING: could not get list of non-root attributes for dir ino 55859222731: Cannot allocate memory (12)

There are also a lot of Call Traces in /var/log/messages:

Sep 17 14:27:52 hostname1 kernel: xfsdump: page allocation failure. order:4, mode:0xd0
Sep 17 14:27:52 hostname1 kernel: Pid: 15289, comm: xfsdump Tainted: G        W  ---------------- T 2.6.32-220.el6.x86_64 #1
Sep 17 14:27:52 hostname1 kernel: Call Trace:
Sep 17 14:27:52 hostname1 kernel: [<ffffffff81123f0f>] ? __alloc_pages_nodemask+0x77f/0x940
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8115ddc2>] ? kmem_getpages+0x62/0x170
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8115e9da>] ? fallback_alloc+0x1ba/0x270
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8115e42f>] ? cache_grow+0x2cf/0x320
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8115e759>] ? ____cache_alloc_node+0x99/0x160
Sep 17 14:27:52 hostname1 kernel: [<ffffffffa044fc55>] ? xfs_attrlist_by_handle+0xb5/0x120 [xfs]
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8115f389>] ? __kmalloc+0x189/0x220
Sep 17 14:27:52 hostname1 kernel: [<ffffffffa044fc55>] ? xfs_attrlist_by_handle+0xb5/0x120 [xfs]
Sep 17 14:27:52 hostname1 kernel: [<ffffffffa0450bfb>] ? xfs_file_ioctl+0x69b/0x8c0 [xfs]
Sep 17 14:27:52 hostname1 kernel: [<ffffffff8109694f>] ? up+0x2f/0x50
Sep 17 14:27:52 hostname1 kernel: [<ffffffffa0441e2b>] ? xfs_trans_brelse+0xdb/0x150 [xfs]
Sep 17 14:27:52 hostname1 kernel: [<ffffffffa041458b>] ? xfs_da_brelse+0x7b/0xc0 [xfs]
Sep 17 14:27:53 hostname1 kernel: [<ffffffff8118a39f>] ? filldir64+0x8f/0xe0
Sep 17 14:27:53 hostname1 kernel: [<ffffffffa04203a5>] ? xfs_dir2_sf_getdents+0x1b5/0x3a0 [xfs]
Sep 17 14:27:53 hostname1 kernel: [<ffffffff8118a310>] ? filldir64+0x0/0xe0
Sep 17 14:27:53 hostname1 kernel: [<ffffffff81189342>] ? vfs_ioctl+0x22/0xa0
Sep 17 14:27:53 hostname1 kernel: [<ffffffffa0418261>] ? xfs_readdir+0xe1/0x130 [xfs]
Sep 17 14:27:53 hostname1 kernel: [<ffffffff811894e4>] ? do_vfs_ioctl+0x84/0x580
Sep 17 14:27:53 hostname1 kernel: [<ffffffff8118a310>] ? filldir64+0x0/0xe0
Sep 17 14:27:53 hostname1 kernel: [<ffffffff8118a652>] ? vfs_readdir+0xa2/0xe0
Sep 17 14:27:53 hostname1 kernel: [<ffffffff81189a61>] ? sys_ioctl+0x81/0xa0
Sep 17 14:27:53 hostname1 kernel: [<ffffffff8100b0f2>] ? system_call_fastpath+0x16/0x1b