Messages in this thread | | | Subject | Re: [PATCH 2/6] arm64/vdso: Zap vvar pages when switching to a time namespace | From | Dmitry Safonov <> | Date | Tue, 16 Jun 2020 14:47:46 +0100 |
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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: [..] >> 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
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