[LU-5205] Recent commit for exception entry check break a Xeon Phi build

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.6.0
• Fix Version/s: Lustre 2.6.0
• Type: Bug
• Priority: Minor
• Reporter: Dmitry Eremin (Inactive)
• Assignee: Yang Sheng
• Resolution: Fixed
• Severity: 3

Description

The Lustre commit c394068ee148595711c661651368b91373bcc78a break a Xeon Phi build.
Reviewed-on: http://review.whamcloud.com/10709

/var/lib/jenkins/workspace/lustre-master/arch/xeonphi/build_type/client/distro/el6/ib_stack/inkernel/BUILD/BUILD/lustre-2.5.60/lustre/mdc/mdc_request.c: In function 'mdc_page_locate':
/var/lib/jenkins/workspace/lustre-master/arch/xeonphi/build_type/client/distro/el6/ib_stack/inkernel/BUILD/BUILD/lustre-2.5.60/lustre/mdc/mdc_request.c:1184:2: error: implicit declaration of function 'radix_tree_exceptional_entry' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors

Comments

[James A Simmons]

What kernel does the phi use and where is the source tree?

[Dmitry Eremin (Inactive)]

Xeon Phi based on 2.6.38 Linux kernel with additional patches for MIC architecture. The sources you can get from MPSS distributive.

1. Download SOURCE tarball from https://software.intel.com/en-us/articles/intel-manycore-platform-software-stack-mpss
2. Unpack linux-2.6.38+mpss*.tar.bz2 from it (this archive is source of Linux kernel from Xeon Phi)

I found commit 6328650bb4d854a7dc1498d1c0048b838b0d340c
Author: Hugh Dickins <[e-mail]>
Date: Wed Aug 3 16:21:18 2011 -0700

radix_tree: exceptional entries and indices

It looks it was included in v3.1 kernel but back ported into RHEL kernel.

[Yang Sheng]

So can we just add some predefine condition for Xeon Phi special or add a config check?

[Peter Jones]

http://review.whamcloud.com/#/c/10734/

[Andreas Dilger]

http://review.whamcloud.com/10734

[Dmitry Eremin (Inactive)]

It's strange but now I have troubles with dependency of libcfsutils.a from libcfs.a. For example, the following error:

k1om-mpss-linux-libtool: link: k1om-mpss-linux-gcc -g -Wall -fPIC -D_GNU_SOURCE -m64 --sysroot=/opt/mpss/3.1.2/sysroots/k1om-mpss-linux -rdynamic --sysroot=/opt/mpss/3.1.2/sysroots/k1om-mpss-linux -Wl,--build-id -o mount.lustre mount_lustre-mount_lustre.o mount_lustre-mount_utils.o  -ldl ../../lnet/utils/libptlctl.a ../../libcfs/libcfs/libcfs.a ../../libcfs/libcfs/libcfsutil.a
../../libcfs/libcfs/libcfsutil.a(libcfsutil_a-nidstrings.o): In function `cfs_parse_nidlist':
/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:906: undefined reference to `libcfs_log_return'
/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:911: undefined reference to `libcfs_log_return'
/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:914: undefined reference to `libcfs_log_return'
../../libcfs/libcfs/libcfsutil.a(libcfsutil_a-nidstrings.o): In function `cfs_match_nid':
/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:954: undefined reference to `libcfs_log_return'
/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:958: undefined reference to `libcfs_log_return'
../../libcfs/libcfs/libcfsutil.a(libcfsutil_a-nidstrings.o):/home/lustre/lustre-release/libcfs/libcfs/nidstrings.c:960: more undefined references to `libcfs_log_return' follow
collect2: ld returned 1 exit status
make[4]: *** [mount.lustre] Error 1

[Peter Jones]

Landed for 2.6