I have continued my investigation about this issue.
On all machines that I have access, with different kernels : 3.2, 3.5.5,
3.14, I have always the same issue.
I am trying to run the tests available in libcgroups 0.41. TEST17 from
second pass and TEST25 from third pass are always failing. These tests are
related to cgroup_get_cgroup().
Can you reproduce and investigate on this, please ?
Best regards,
2014-12-09 17:21 GMT+01:00 Alexandre LAURENT <
pro.laurent.alexan...@gmail.com>:
>
> Hello,
>
> I am attaching the strace from my program.
> This segment appears when I am calling cgroup_get_cgroup() :
>
> access("/cgroup/freezer/grp_1", F_OK) = 0
> stat("/cgroup/freezer/grp_1//tasks", {st_mode=S_IFREG|0644, st_size=0,
> ...}) = 0
> gettid() = 18300
> write(2, "E1209 16:57:17.328337 18300 cgro"..., 108) = 108
>
> (gettid() and write() calls are coming from my logger.)
>
> Thanks for your help,
>
>
>
> 2014-12-08 18:52 GMT+01:00 Balbir Singh <bsinghar...@gmail.com>:
>
>> Thanks.. we need the strace logs for the run
>>
>> Balbir Singh.
>>
>> On Mon, Dec 8, 2014 at 10:34 PM, Alexandre LAURENT
>> <pro.laurent.alexan...@gmail.com> wrote:
>> > As far as I know, yes, it is compiled. Memory controller is normally
>> mounted
>> > in /cgroup/ and all files are present.
>> > Here my kernel config :
>> >
>> > CONFIG_CGROUPS=y
>> > # CONFIG_CGROUP_DEBUG is not set
>> > CONFIG_CGROUP_FREEZER=y
>> > CONFIG_CGROUP_DEVICE=y
>> > CONFIG_CGROUP_CPUACCT=y
>> > CONFIG_CGROUP_MEM_RES_CTLR=y
>> > CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
>> > # CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED is not set
>> > CONFIG_CGROUP_PERF=y
>> > CONFIG_CGROUP_SCHED=y
>> > CONFIG_BLK_CGROUP=y
>> > # CONFIG_DEBUG_BLK_CGROUP is not set
>> > CONFIG_NET_CLS_CGROUP=y
>> >
>> > If I disable memory controller everything will work fine with all other
>> > controllers. But, when enabling again memory controller, I have problems
>> > getting some files like freezer.state or memory.failctn. I guess this is
>> > because of the failure of cgroup_get_cgroup().
>> >
>> > Am I missing something ?
>> >
>> > Best regards,
>> >
>> >
>> > 2014-12-08 11:32 GMT+01:00 Balbir Singh <bsinghar...@gmail.com>:
>> >>
>> >> On Mon, Dec 8, 2014 at 3:52 PM, Alexandre LAURENT
>> >> <pro.laurent.alexan...@gmail.com> wrote:
>> >> > Hello,
>> >> >
>> >> > I am using libcg 0.41 and Linux Kernel 3.2.0.4 (AMD 64) on Debian 7.
>> >> > When I am using memory controller (and some others) through the
>> >> > following
>> >> > config file :
>> >> > ---
>> >> > mount {
>> >> > cpu = /cgroup/cpu;
>> >> > freezer = /cgroup/freezer;
>> >> > net_cls = /cgroup/net_cls;
>> >> > blkio = /cgroup/blkio;
>> >> > memory = /cgroup/memory;
>> >> > }
>> >> > ---
>> >> >
>> >> > the cgroup_get_cgroup() function is returning an error "Cgroup
>> invalid
>> >> > operation".
>> >> > The error seems to be emitted from cgroup_add_controller() which will
>> >> > return on this case :
>> >> > /*
>> >> > * Still not sure how to handle the failure here.
>> >> > */
>> >> > for (i = 0; i < cgroup->index; i++) {
>> >> > if (strncmp(name, cgroup->controller[i]->name,
>> >> > sizeof(cgroup->controller[i]->name)) == 0)
>> >> > {
>> >> > return NULL;
>> >> > }
>> >> > }
>> >> >
>> >> >
>> >> > When commenting the memory controller line, the error disappear.
>> >> > I have also tried to output all debug messages available in libcg,
>> but
>> >> > none
>> >> > of these seems related to this issue.
>> >> >
>> >> > What can cause this issue ?
>> >>
>> >> Is memory cgroup compiled?
>> >>
>> >> Balbir Singh.
>> >
>> >
>>
>
>
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