Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Eric W. Biederman
Lord Glauber Costa of Sealand writes: >> For two pieces of software that were designed to complement each other >> I find it a bit surprising how many people (including myself) need the >> connection made that memory control groups and user namespaces should go >> together. > > Well, I've manifes

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Lord Glauber Costa of Sealand
On 01/28/2013 08:19 PM, Eric W. Biederman wrote: > Lord Glauber Costa of Sealand writes: > >> On 01/28/2013 12:14 PM, Eric W. Biederman wrote: >>> Lord Glauber Costa of Sealand writes: >>> I just saw in a later patch of yours that your concern here seems not limited to backed ram by tm

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Eric W. Biederman
Lord Glauber Costa of Sealand writes: > On 01/28/2013 12:14 PM, Eric W. Biederman wrote: >> Lord Glauber Costa of Sealand writes: >> >>> I just saw in a later patch of yours that your concern here seems not >>> limited to backed ram by tmpfs, but with things like the internal >>> structures for

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Lord Glauber Costa of Sealand
On 01/28/2013 12:14 PM, Eric W. Biederman wrote: > Lord Glauber Costa of Sealand writes: > >> I just saw in a later patch of yours that your concern here seems not >> limited to backed ram by tmpfs, but with things like the internal >> structures for userns , to avoid patterns in the form: 'for (

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Eric W. Biederman
Lord Glauber Costa of Sealand writes: > I just saw in a later patch of yours that your concern here seems not > limited to backed ram by tmpfs, but with things like the internal > structures for userns , to avoid patterns in the form: 'for (;;) > unshare(...)' > > Humm, it does seem sensible. The

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-28 Thread Eric W. Biederman
Lord Glauber Costa of Sealand writes: > On 01/26/2013 06:22 AM, Eric W. Biederman wrote: >> >> In the help text describing user namespaces recommend use of memory >> control groups. In many cases memory control groups are the only >> mechanism there is to limit how much memory a user who can cr

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-27 Thread Lord Glauber Costa of Sealand
On 01/28/2013 11:37 AM, Lord Glauber Costa of Sealand wrote: > On 01/26/2013 06:22 AM, Eric W. Biederman wrote: >> >> In the help text describing user namespaces recommend use of memory >> control groups. In many cases memory control groups are the only >> mechanism there is to limit how much memo

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-27 Thread Lord Glauber Costa of Sealand
On 01/26/2013 06:22 AM, Eric W. Biederman wrote: > > In the help text describing user namespaces recommend use of memory > control groups. In many cases memory control groups are the only > mechanism there is to limit how much memory a user who can create > user namespaces can use. > > Signed-of

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-26 Thread Eric W. Biederman
"Serge E. Hallyn" writes: > Quoting Eric W. Biederman (ebied...@xmission.com): >> >> In the help text describing user namespaces recommend use of memory >> control groups. In many cases memory control groups are the only >> mechanism there is to limit how much memory a user who can create >> us

Re: [PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-26 Thread Serge E. Hallyn
Quoting Eric W. Biederman (ebied...@xmission.com): > > In the help text describing user namespaces recommend use of memory > control groups. In many cases memory control groups are the only > mechanism there is to limit how much memory a user who can create > user namespaces can use. > > Signed-

[PATCH review 3/6] userns: Recommend use of memory control groups.

2013-01-25 Thread Eric W. Biederman
In the help text describing user namespaces recommend use of memory control groups. In many cases memory control groups are the only mechanism there is to limit how much memory a user who can create user namespaces can use. Signed-off-by: "Eric W. Biederman" --- Documentation/namespaces/resour