Re: [RFC][PATCH][0/3] introduce rlimit cgroup
From: Hirofumi Nakagawa
Date: Sat Jul 26 2008 - 03:56:25 EST
Hi,
Thank you for your comments.
I understand that.
I'll look for other approach for this.
thanks
I understand that there might be some cases where it is useful to
allow some process to set rlimits of other processes (e.g. some
launcher process might want to control resources of all the
applications being launched by it). But this has to be a very special
case or this process needs to have special permission to do that
otherwise there will be a lot of problems as a side effect.
Ram
On Fri, Jul 25, 2008 at 1:05 AM, Paul Menage <menage@xxxxxxxxxx> wrote:
To set rlimit from other processes is my original intention.
For I do not see a way to do it, please let me know if there were any
exists.
No, there's no way to do that currently. I'm not sure if it's
generally safe to update the rlimit for another process.
If we're trying to use rlimits in a cgroup context then some rlimits
(e.g. max nice priority) ought to apply as additional caps on the
processes in the cgroup (e.g. if you set a max nice priority of 1 on a
cgroup, that ought to override any per-process settings) whereas
others (e.g. locked memory, open files, num processes) ought to apply
as an aggregate limit on the cgroup (so the sum of all open files
across the cgroup shouldn't be able to exceed the cgroup's "open
files" limit). E.g. see Balbir's memrlimit control groups patches that
are currently in -mm.
What concrete problem are you trying to solve here?
Paul
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