Messages in this thread |  | | Subject | Re: [PATCH v13 4/7] arm64: mte: Enable TCO in functions that can read beyond buffer limits | From | Vincenzo Frascino <> | Date | Tue, 23 Feb 2021 12:22:27 +0000 |
| |
On 2/23/21 12:05 PM, Catalin Marinas wrote: >> I totally agree on this point. In the case of runtime switching we might need >> the rethink completely the strategy and depends a lot on what we want to allow >> and what not. For the kernel I imagine we will need to expose something in sysfs >> that affects all the cores and then maybe stop_machine() to propagate it to all >> the cores. Do you think having some of the cores running in sync mode and some >> in async is a viable solution? > stop_machine() is an option indeed. I think it's still possible to run > some cores in async while others in sync but the static key here would > only be toggled when no async CPUs are left. >
In such a case we might need to track the state based on cpuid() and have a mask that tells us when cpus are all sync. Not as expensive as stop_machine() but still requires a valid use case to be introduced according to me.
-- Regards, Vincenzo
|  |