lkml.org 
[lkml]   [2006]   [Jun]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 5/16] 2.6.17-rc6 perfmon2 patch for review: new sysfs support
Chuck,

On Sat, Jun 17, 2006 at 11:36:36PM -0400, Chuck Ebbert wrote:
> In-Reply-To: <200606150907.k5F97YtU008130@frankl.hpl.hp.com>
>
> On Thu, 15 Jun 2006 02:07:34 -0700, Stephane Eranian wrote:
>
> > --- linux-2.6.17-rc6.orig/perfmon/perfmon_sysfs.c 1969-12-31 16:00:00.000000000 -0800
> > +++ linux-2.6.17-rc6/perfmon/perfmon_sysfs.c 2006-06-08 05:36:31.000000000 -0700
> ...
> > +struct pfm_controls pfm_controls = {
> > + .sys_group = PFM_GROUP_PERM_ANY,
> > + .task_group = PFM_GROUP_PERM_ANY,
> > + .arg_size_max = PAGE_SIZE,
> > + .smpl_buf_size_max = ~0,
> > +};
>
> This means that by default anyone can create monitoring sessions.

Yes.

> It should start out as restrictive as possible; the admin can relax
> permissions as needed.
>

I would expect distros to set it in a more restrictive way. That is what
I have observed with the Resources Limits such as RLIMIT_MEMLOCK, for instance.

I am not sure what the mainline policy is on this.

I am glad you looked at that permission code because I found a bug there
related to sys_group/task_group.

Thanks.

--

-Stephane
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-06-19 15:46    [W:0.037 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site