Re: [LTP] [PATCH] cgroups: conditionally enable building cgroup tests

[Francesco RUNDO <francesco.rundo@st.com>]

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Hi Subrata,

Ok, thanks for your reply.
Currently I'm working with kernel 2.6.23-17 ported for SH platforms, 
without cgroup features.

My target was to understand if my previous patch can help Gowri....but I 
think no.... ;-)

Regards
Francesco Rundo

Subrata Modak wrote:

>On Mon, 2009-07-06 at 14:42 +0200, Francesco RUNDO wrote:
>  
>
>>Hi Gowri,
>>
>>thanks so much for your quick reply.
>>My question is: "Is there a 'real' scenario in which cgroup is enabled 
>>in the Kernel without cgroupstat.h header" ?
>>
>>    
>>
>
>Yes, there can be many situations.
>
>  
>
>>Because I think the above scenario (cgroup enabled but no cgroupstat.h 
>>header) is wrong so that your patch provide a "cover" for an error 
>>placed in the system. Is it true ?
>>
>>    
>>
>
>Say you have a older distro with kernel 2.6.18, where those stuff are
>not there. Now, you have built kernel 2.6.30 on it with CGROUP enabled,
>and booted in that kernel. So, your kernel is enabled with CGROUP, but
>you may not have the user utilities like the libcgroup, etc. And until
>you upgrade your system with latest glibc-headers or kernel-headers, any
>build for userspace tools using CGROUP*.h fiel fail.
>
>Regards--
>Subrata
>
>  
>
>>If my understanding is wrong, for me there are no concerns about your patch.
>>
>>Regards
>>Francesco Rundo
>>
>>gowrishankar wrote:
>>
>>    
>>
>>>Hi Francesco,
>>>
>>>Francesco RUNDO wrote:
>>>
>>>      
>>>
>>>>Hi Gowri,
>>>>
>>>>I've already fixed the same issue you reported. I've tested it 
>>>>successfully.
>>>>
>>>>Subrata has already merged my patch (please, find it in attachment).
>>>>
>>>>Please, check it before to submit another patch.
>>>>
>>>>        
>>>>
>>>I had already seen your patch and generated mine on top of Jun release 
>>>(which
>>>has your fix for CROSS_COMPILE).Your patch could not help in a 
>>>scenario where kernel has cgroup support but cgroupstat.h file is 
>>>missing in base OS, and
>>>build failed. And hence, I am proposing this patch.
>>>
>>>Thanks,
>>>Gowri
>>>
>>>      
>>>
>>>>Thanks
>>>>Regards
>>>>Francesco Rundo
>>>>
>>>>gowrishankar wrote:
>>>>
>>>>        
>>>>
>>>>>Hi Subrata,
>>>>>Please accept the patch below.
>>>>>
>>>>>Thanks,
>>>>>Gowri
>>>>>---
>>>>>cgroups: conditionally enable building cgroup tests
>>>>>
>>>>>controllers tests gets included into default ltp build if 
>>>>>"/proc/cgroup"
>>>>>exists. It stops the ltp build in realtime kernel environment where 
>>>>>kernel
>>>>>is new and supports cgroups, but necessary file 
>>>>>"linux/cgroupstats.h" may not
>>>>>exist in the base OS (like RHEL5.3). So configure command enables 
>>>>>the build,
>>>>>but actual build fails, due to missing header file.
>>>>>
>>>>>Below patch proposes new symbol LTP_CHECK_CGROUPSTATS to check for 
>>>>>header file
>>>>>"linux/cgroupstats.h" and include controllers in the list of tests 
>>>>>to build.
>>>>>
>>>>>Tested the patch in non-RT as well as RT environment for the changes.
>>>>>
>>>>>Signed-off-by: Gowrishankar <gowrishankar.m@in.ibm.com>
>>>>>Tested-by: Gowrishankar <gowrishankar.m@in.ibm.com>
>>>>>---
>>>>>
>>>>>------------------------------------------------------------------------ 
>>>>>
>>>>>
>>>>>Index: ltp-full-20090630/m4/ltp-cgroupstats.m4
>>>>>===================================================================
>>>>>--- /dev/null    1970-01-01 00:00:00.000000000 +0000
>>>>>+++ ltp-full-20090630/m4/ltp-cgroupstats.m4    2009-07-03 
>>>>>13:41:55.000000000 +0530
>>>>>@@ -0,0 +1,9 @@
>>>>>+dnl
>>>>>+dnl LTP_CHECK_CGROUPSTATS
>>>>>+dnl ----------------------------
>>>>>+dnl
>>>>>+AC_DEFUN([LTP_CHECK_CGROUPSTATS],
>>>>>+[dnl
>>>>>+AC_CHECK_HEADERS(linux/cgroupstats.h,[LTP_CHECK_CGROUPSTATS_HEADER=yes]) 
>>>>>
>>>>>+AC_SUBST(LTP_CHECK_CGROUPSTATS_HEADER)
>>>>>+])
>>>>>Index: ltp-full-20090630/configure.ac
>>>>>===================================================================
>>>>>--- ltp-full-20090630.orig/configure.ac    2009-07-03 
>>>>>13:59:48.000000000 +0530
>>>>>+++ ltp-full-20090630/configure.ac    2009-07-03 14:00:14.000000000 
>>>>>+0530
>>>>>@@ -21,5 +21,6 @@
>>>>> LTP_CHECK_SELINUX
>>>>> LTP_CHECK_CRYPTO
>>>>> LTP_CHECK_TASKSTATS
>>>>>+LTP_CHECK_CGROUPSTATS
>>>>>
>>>>> AC_OUTPUT
>>>>>Index: ltp-full-20090630/testcases/kernel/Makefile
>>>>>===================================================================
>>>>>--- ltp-full-20090630.orig/testcases/kernel/Makefile    2009-07-03 
>>>>>14:01:25.000000000 +0530
>>>>>+++ ltp-full-20090630/testcases/kernel/Makefile    2009-07-03 
>>>>>14:02:42.000000000 +0530
>>>>>@@ -1,6 +1,12 @@
>>>>>-SUBDIRS = power_management numa containers controllers connectors 
>>>>>include fs io ipc mem pty sched security syscalls timers
>>>>>+include ../../config.mk
>>>>>+
>>>>>+SUBDIRS = power_management numa containers connectors include fs io 
>>>>>ipc mem pty sched security syscalls timers
>>>>> UCLINUX_SUBDIRS = include syscalls
>>>>>
>>>>>+ifeq ($(LTP_CHECK_CGROUPSTATS_HEADER),yes)
>>>>>+    SUBDIRS+= controllers
>>>>>+endif
>>>>>+
>>>>> all:
>>>>>     @set -e; for i in $(SUBDIRS); do $(MAKE) -C $$i ; done
>>>>>
>>>>>  
>>>>>------------------------------------------------------------------------ 
>>>>>
>>>>>
>>>>>------------------------------------------------------------------------------ 
>>>>>
>>>>>  
>>>>>------------------------------------------------------------------------ 
>>>>>
>>>>>
>>>>>_______________________________________________
>>>>>Ltp-list mailing list
>>>>>Ltp-list@lists.sourceforge.net
>>>>>https://lists.sourceforge.net/lists/listinfo/ltp-list
>>>>>  
>>>>>          
>>>>>
>>>      
>>>
>
>
>  
>

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