[Bug 756894] Re: mount.ocfs2: join errors when node with kernel >= 2.6.37 joins with nodes with kernels < 2.6.37

[iMac]

I successfully applied the attached patch against the current linux-
image-2.6.38-8-server (.42) ubuntu source.  I grabbed it from this post,
and have attached it here separately.

http://oss.oracle.com/pipermail/ocfs2-devel/2011-April/007996.html

It seems like an easily reviewed merge to current 2.6.37 as it appears
to simply correct an error in the code where the locking protocol
version is evaluated.

I also confirmed this is pending for next bundle into upstream 2.6.39
with oracle. (i.e not in 2.6.39-rc2 changelog yet)

[   67.429903] scsi0 : iSCSI Initiator over TCP/IP
[   67.724378] scsi 0:0:0:0: Direct-Access     IET      VIRTUAL-DISK     0    PQ: 0 ANSI: 4
[   67.724627] sd 0:0:0:0: Attached scsi generic sg0 type 0
[   67.735449] sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
[   67.735606] sd 0:0:0:0: [sda] 7814045696 512-byte logical blocks: (4.00 TB/3.63 TiB)
[   67.735745] sd 0:0:0:0: [sda] Write Protect is off
[   67.735750] sd 0:0:0:0: [sda] Mode Sense: 77 00 00 08
[   67.736025] sd 0:0:0:0: [sda] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
[   67.737612] sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
[   67.749812]  sda: unknown partition table
[   67.751647] sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
[   67.752307] sd 0:0:0:0: [sda] Attached SCSI disk
[   72.030876] o2net: connected to node media (num 0) at 192.168.79.14:7777
[   76.156603] OCFS2 1.5.0
[   76.169929] o2dlm: Nodes in domain D34223F35D4749C381B259A942DE351B: 0 1 
[   76.195126] JBD: Ignoring recovery information on journal
[   76.300303] ocfs2: Mounting device (8,0) on (node 1, slot 1) with ordered data mode.

root at ibm-main:~# uname -a
Linux ibm-main 2.6.38-8-server #42 SMP Wed Apr 13 10:32:23 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux


** Attachment added: "Patch submitted by oracle to upstream 2.6.39"
   https://bugs.launchpad.net/ocfs2/+bug/756894/+attachment/2033045/+files/o2cb_locking_protocol_patch.txt.gz

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https://bugs.launchpad.net/bugs/756894

Title:
  mount.ocfs2: join errors when node with kernel >= 2.6.37 joins with
  nodes with kernels < 2.6.37