linux-toradex.git/tools/testing, branch v3.5-rc6

syscalls, x86: add __NR_kcmp syscall

2012-06-01T00:49:32+00:00

While doing the checkpoint-restore in the user space one need to determine
whether various kernel objects (like mm_struct-s of file_struct-s) are
shared between tasks and restore this state.

The 2nd step can be solved by using appropriate CLONE_ flags and the
unshare syscall, while there's currently no ways for solving the 1st one.

One of the ways for checking whether two tasks share e.g.  mm_struct is to
provide some mm_struct ID of a task to its proc file, but showing such
info considered to be not that good for security reasons.

Thus after some debates we end up in conclusion that using that named
'comparison' syscall might be the best candidate.  So here is it --
__NR_kcmp.

It takes up to 5 arguments - the pids of the two tasks (which
characteristics should be compared), the comparison type and (in case of
comparison of files) two file descriptors.

Lookups for pids are done in the caller's PID namespace only.

At moment only x86 is supported and tested.

[akpm@linux-foundation.org: fix up selftests, warnings]
[akpm@linux-foundation.org: include errno.h]
[akpm@linux-foundation.org: tweak comment text]
Signed-off-by: Cyrill Gorcunov 
Acked-by: "Eric W. Biederman" 
Cc: Pavel Emelyanov 
Cc: Andrey Vagin 
Cc: KOSAKI Motohiro 
Cc: Ingo Molnar 
Cc: H. Peter Anvin 
Cc: Thomas Gleixner 
Cc: Glauber Costa 
Cc: Andi Kleen 
Cc: Tejun Heo 
Cc: Matt Helsley 
Cc: Pekka Enberg 
Cc: Eric Dumazet 
Cc: Vasiliy Kulikov 
Cc: Alexey Dobriyan 
Cc: Valdis.Kletnieks@vt.edu
Cc: Michal Marek 
Cc: Frederic Weisbecker 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tools/selftests: add mq_perf_tests

2012-06-01T00:49:31+00:00

Add the mq_perf_tests tool I used when creating my mq performance patch.
Also add a local .gitignore to keep the binaries from showing up in git
status output.

[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Doug Ledford 
Cc: Stephen Rothwell 
Cc: Manfred Spraul 
Cc: Frederic Weisbecker 
Acked-by: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests: add mq_open_tests

2012-06-01T00:49:31+00:00

Add a directory to house POSIX message queue subsystem specific tests.
Add first test which checks the operation of mq_open() under various
corner conditions.

Signed-off-by: Doug Ledford 
Cc: KOSAKI Motohiro 
Cc: Doug Ledford 
Cc: Joe Korty 
Cc: Amerigo Wang 
Cc: Serge E. Hallyn 
Cc: Jiri Slaby 
Cc: Manfred Spraul 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ktest: Change singular "paranthesis" to plural "parentheses"

2012-05-23T14:19:09+00:00

Acked-by: Randy Dunlap 
Signed-off-by: Jesper Juhl 
Signed-off-by: Steven Rostedt

ktest: Add README to explain what is in the examples directory

2012-05-22T04:15:12+00:00

Add a README that explains what the different example configs in the
ktest example directory are about.

Signed-off-by: Steven Rostedt

ktest: Add the snowball.conf example config

2012-05-22T04:13:32+00:00

I used the snowball.conf in a live demo that demonstrated how to use
ktest.pl with a snowball ARM board. I've been asked to included that
config in the ktest repository.

Here it is.

Signed-off-by: Steven Rostedt

ktest: Add an example config that does cross compiling of several archs

2012-05-22T04:11:00+00:00

Add the config that I use to test several archs. I downloaded several
cross compilers from:

 http://kernel.org/pub/tools/crosstool/files/bin/x86_64/

and this config is an example to crosscompile several archs to make sure
that your changes do not break archs that you are not working on.

Signed-off-by: Steven Rostedt

ktest: Add kvm.conf example config

2012-05-22T04:10:12+00:00

Add an example config that explains how to use ktest with a virtual
guest as the target.

Signed-off-by: Steven Rostedt

ktest: Add useful example configs

2012-05-22T04:08:30+00:00

I've been asked several times to provide more useful example configs for
ktest.pl, as the sample.conf is too complex (because it explains all
configs). This adds configs broken up by use case, and these configs are
based on actual configs that I use on a daily basis.

Signed-off-by: Steven Rostedt

ktest: Add USE_OUTPUT_MIN_CONFIG to avoid prompt on make_min_config

2012-05-22T04:07:34+00:00

If the file that OUTPUT_MIN_CONFIG exists then ktest.pl will prompt the
user and ask them if the OUTPUT_MIN_CONFIG should be used as the
starting point for make_min_config instead of MIN_CONFIG.

This is usually the case, and to allow the user to do so, which is
helpful if the user is creating different min configs based on tests,
and they know one is a superset of another test, they can set
USE_OUTPUT_MIN_CONFIG to one, which will prevent kest.pl from prompting
to use the OUTPUT_MIN_CONFIG and it will just use it.

If USE_OUTPUT_MIN_CONIFG is set to zero, then ktest.pl will continue to
use MIN_CONFIG instead.

The default is that USE_OUTPUT_MIN_CONFIG is undefined.

Signed-off-by: Steven Rostedt