| From | Andy Lutomirski <> | Date | Mon, 13 Jul 2015 13:40:58 -0700 | Subject | Re: [PATCH v4 1/5] nohz_full: add support for "cpu_isolated" mode |
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On Mon, Jul 13, 2015 at 12:57 PM, Chris Metcalf <cmetcalf@ezchip.com> wrote: > The existing nohz_full mode makes tradeoffs to minimize userspace > interruptions while still attempting to avoid overheads in the > kernel entry/exit path, to provide 100% kernel semantics, etc. > > However, some applications require a stronger commitment from the > kernel to avoid interruptions, in particular userspace device > driver style applications, such as high-speed networking code. > > This change introduces a framework to allow applications to elect > to have the stronger semantics as needed, specifying > prctl(PR_SET_CPU_ISOLATED, PR_CPU_ISOLATED_ENABLE) to do so. > Subsequent commits will add additional flags and additional > semantics.
I thought the general consensus was that this should be the default behavior and that any associated bugs should be fixed.
--Andy
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