Hi Mark,

On 6/16/20 12:24 PM, Mark Rutland wrote:

On Tue, Jun 16, 2020 at 12:55:41AM -0700, Andrei Vagin wrote:

[..]

quoted

Whenever a task changes its namespace, the VVAR
page tables are cleared and then they will be re-faulted with a
corresponding layout.

How does this work for multi-threaded applications? Are there any
concerns w.r.t. atomicity of the change?

Multi-threaded applications can't setns() for time namespace,
timens_install():

:	if (!current_is_single_threaded())
:		return -EUSERS;

Thanks,
          Dmitry

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel