Pavel Emelianov wrote:
> Balbir Singh wrote:
>>> +
>>> +asmlinkage long sys_set_bcid(bcid_t id)
>>> +{
>>> + int error;
>>> + struct beancounter *bc;
>>> + struct task_beancounter *task_bc;
>>> +
>>> + task_bc = ¤t->task_bc;
>> I was playing around with the bc patches and found that to make
>> use of bc's, I had to actually call set_bcid() and then exec() a
>> task/shell so that the id would stick around. Would you consider
> That sounds very strange as sys_set_bcid() actually changes current's
> exec_bc.
> One note is about mm's bc - mm obtains new bc only after fork or exec -
> that's
> true. But kmemsize starts charging right after the sys_set_bcid.
I was playing around only with kmemsize. I think the reason for my observation
is this
bash --> (my utility) --> set_bcid()
Since bash spawns my utility in a separate process, it creates and assigns
a bean counter to it and then my utility exits. Unless it spawns/exec()'s a
new shell, the beancounter is freed when the task exits (my utility).
>> changing sys_set_bcid to sys_set_task_bcid() or adding a new
>> system call sys_set_task_bcid()? We could pass the pid that we
>> intend to associate with the new id. This also means we'll need
>> locking around to protect task->task_bc.
>
--
Balbir Singh,
Linux Technology Center,
IBM Software Labs
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
ckrm-tech mailing list
https://lists.sourceforge.net/lists/listinfo/ckrm-tech
