[LU-4668] compile error on ppc64: asm/stacktrace.h: No such file or directory

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.6.0
• Affects Version/s: Lustre 2.6.0
• Environment: Lustre Build: http://build.whamcloud.com/job/lustre-master/1909/; Distro/Arch: RHEL6.5/ppc64
• Severity: 3
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

While compiling Lustre master branch against kernel 2.6.32-431.5.1.el6 on RHEL6.5/ppc64 by using lbuild, I hit the following errors:

/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:188:28: error: asm/stacktrace.h: No such file or directory
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:220: error: variable 'print_trace_ops' has initializer but incomplete type
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:225: error: unknown field 'stack' specified in initializer
cc1: warnings being treated as errors
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:225: error: excess elements in struct initializer
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:225: error: (near initialization for 'print_trace_ops')
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:226: error: unknown field 'address' specified in initializer
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:226: error: excess elements in struct initializer
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:226: error: (near initialization for 'print_trace_ops')
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c: In function 'libcfs_debug_dumpstack':
/root/lustre-release/build/BUILD/lustre-2.5.55/libcfs/libcfs/linux/linux-debug.c:241: error: implicit declaration of function 'dump_trace'

The lbuild log "lbuild.ppc64.log" is attached.

Issue Links

• is related to: LU-4199 Lustre client support for ARM platform

Comments

[Jodi Levi (Inactive)]

Patch landed to Master.

[Jian Yu]

Hi James, I was intended to verify the updated patch but did not find time.

Just verified that the compile error was resolved with the patch applied on the master branch. Thanks, James.

[James A Simmons]

Jian does the updated patch at http://review.whamcloud.com/#/c/8872 fix your build issue now?

[James A Simmons]

Since we are only support dump_trace on X86 anyways this means we can move stacktrace.h and nmi.h to the CONFIG_X86 section of the patch. I pushed a new version of the patch to handle this.

[Jian Yu]

Hi James,

Thank you for the info. I just tried patch #8872 and got the following compile error on ppc64:

/root/lustre-release/build/BUILD/lustre-2.5.56/libcfs/libcfs/linux/linux-debug.c:188:28: error: asm/stacktrace.h: No such file or directory
make[6]: *** [/root/lustre-release/build/BUILD/lustre-2.5.56/libcfs/libcfs/linux/linux-debug.o] Error 1
make[6]: *** Waiting for unfinished jobs....

This is because:

# pwd
/root/kernel/rpmbuild/SOURCES/linux-2.6.32-431.5.1.el6/arch

# find ./arm -name stacktrace.h
./arm/include/asm/stacktrace.h

# find ./powerpc -name stacktrace.h
#

The stacktrace.h is supported by arm (although it does not support dump_trace), but not by powerpc.
So, a check is still needed before "#include <asm/stacktrace.h>" in libcfs/libcfs/linux/linux-debug.c.

[James A Simmons]

We ran into the same problem for the ARM client support. Can you try patch

http://review.whamcloud.com/#/c/8872

If that patch works for you can this ticket be linked to LU-4199 since the same problem overlaps.

[Jian Yu]

This is because patch http://review.whamcloud.com/5403 removed LIBCFS_FUNC_DUMP_TRACE test.

Since dump_trace is not supported by powerpc arch, we need restore the test. Here is the patch for master branch: http://review.whamcloud.com/9381