Messages in this thread | | | Date | Fri, 15 Apr 2016 15:12:42 +0100 | From | Will Deacon <> | Subject | Re: [PATCH 4/5] arm64: Verify CPU errata work arounds on hotplugged CPU |
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On Fri, Apr 15, 2016 at 03:10:27PM +0100, Suzuki K Poulose wrote: > On 14/04/16 18:49, Suzuki K Poulose wrote: > >On 14/04/16 18:39, Will Deacon wrote: > >>On Wed, Apr 06, 2016 at 12:24:13PM +0100, Suzuki K Poulose wrote: > >>>CPU Errata work arounds are detected and applied to the > >>>kernel code at boot time and the data is then freed up. > >>>If a new hotplugged CPU requires a work around which > >>>was not applied at boot time, there is nothing we can > >>>do but simply fail the booting. > >> > >>Hmm, wouldn't it be better not to free the alternative text for errata > >>workarounds instead? > > > >We could. I don't have a strong opinion. If there are no objections, I could > >adopt it. > > The alternatives have been merged to .init by : > > commit 9aa4ec1571da6236 ("arm64: mm: fold alternatives into .init") > > Mark, > > Do you have any concerns on applying alternatives for CPUs turned online later ? > We have to revert the patch above to get going
Well, note that I'm only suggesting that we keep the alternatives for CPU errata workarounds.
Will
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