[LTP] [PATCH v3 0/3] add CMA test

[Jan Stancek <jstancek@redhat.com>]

changes in v3:
- add forgotten void in the cma_test_errnos() parameters
- change branching based on program parameter
- make return right in place instead of setting ret variable
  and returning at the end of the function
- dont pass TEST_ERRNO, use TTERNNO in tst_*()
- no need to pass tst_exit as cleanup fn to SAFE_*() macros
- remove useless initialization of variables
- avoid indirection when copying parameters
- use /proc/sys/kernel/pid_max + 1 as invalid pid
- add missing munmap

changes in v2:
- dropped configure check as glibc wrapper calls syscall directly,
  and using syscall(2) we can test also when glibc wrappers are missing
- added simplified process_vm.h

CMA (cross memory attach) feature introduced 2 new syscalls:
process_vm_readv
process_vm_writev

commit fcf634098c00dd9cd247447368495f0b79be12d1
Author: Christopher Yeoh <cyeoh@au1.ibm.com>
Date: Mon Oct 31 17:06:39 2011 -0700
Cross Memory Attach

"The basic idea behind cross memory attach is to allow MPI programs doing
intra-node communication to do a single copy of the message rather than
a double copy of the message via shared memory." [1]

This patch series is introducing the initial structure under syscalls/cma
and first test to check various errno codes as described in proposed man
page [2].

[1] http://lwn.net/Articles/451188/
[2] http://ozlabs.org/~cyeoh/cma/process_vm_readv.txt


Jan Stancek (3):
  add testcases/kernel/syscalls/cma
  cma: add process_vm.h
  syscalls/cma: add errno tests

 runtest/syscalls                                   |    3 +
 testcases/kernel/syscalls/cma/Makefile             |   22 +
 testcases/kernel/syscalls/cma/process_vm.h         |   58 +++
 testcases/kernel/syscalls/cma/process_vm01.c       |  431 ++++++++++++++++++++
 .../kernel/syscalls/cma/process_vm_readv/Makefile  |   22 +
 .../kernel/syscalls/cma/process_vm_writev/Makefile |   22 +
 6 files changed, 558 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/syscalls/cma/Makefile
 create mode 100644 testcases/kernel/syscalls/cma/process_vm.h
 create mode 100644 testcases/kernel/syscalls/cma/process_vm01.c
 create mode 100644 testcases/kernel/syscalls/cma/process_vm_readv/Makefile
 create mode 100644 testcases/kernel/syscalls/cma/process_vm_writev/Makefile

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