[LU-1116] support rhel6.2 patchless client on 1.8.x

Wed, 9 May 2012 12:30:27 +0000

RHEL6.2 pathcless client needs to be supported on 1.8.x. Intel and AMD CPU based server requires rhel6.2's kernel to support full functions and performance. The master branch supports for this distribution, so at least we need backport the following patches from master branch, and one code change for the patchless client.

~~LU-766~~ Incorrect HAVE_STATFS_DENTRY_PARAM result
~~LU-778~~ RHEL 6.2: rdma_create_id() takes four arguments
~~LU-1050~~ configure broken on centos6.2 with OFED-1.5.4

On rhel6.2's kenrel, an function name roundup() in include/linux/kernel.h was changed to round_up() which is duplicated what the lustre used in lustre/mdc/mdc_locks.c.
So, we may need to change this function name like lu_round_up(). This is discussed on wc-discuss.

--- a/lustre/mdc/mdc_locks.c	2012-01-12 15:54:32.731336048 +0100
+++ b/lustre/mdc/mdc_locks.c	2012-01-12 15:54:46.072345471 +0100
@@ -185,7 +185,7 @@
         }
 }
 
-static int round_up(int val)
+static int lu_round_up(int val)
 {
         int ret = 1;
         while (val) {
@@ -301,7 +301,7 @@
         rc = lustre_msg_size(class_exp2cliimp(exp)->imp_msg_magic,
                              bufcount, size);
         if (rc & (rc - 1))
-                size[bufcount - 1] = min(size[bufcount - 1] + round_up(rc) - rc,
+                size[bufcount - 1] = min(size[bufcount - 1] + lu_round_up(rc) - rc,
                                          (__u32)obddev->u.cli.cl_max_mds_easize);
 
         /* If inode is known, cancel conflicting OPEN locks. */

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[LU-1116] support rhel6.2 patchless client on 1.8.x