[PATCH] um: allow using glibc string functions instead of generics

[Anton Ivanov]

On 10/11/2020 21:29, Richard Weinberger wrote:
> ----- Ursprüngliche Mail -----
>> Von: "anton ivanov" <anton.ivanov at cambridgegreys.com>
>>> On what workload did you see such a huge performance improvement?
>> File IO ~ 1% or thereabouts, iperf - 2-4%.
>>
>>> The in-kernel variants of memcpy and such are already well optimized.
>> UML has no string.h in asm which means it falls back to
>> asm-generic/string.h which in turn pulls in the ones from lib/string.c
>>
>> These are not optimized.
> Hmmm, I think it should use the highly optimized variants from arch/x86.

That is the other option - to bring in string32.h and string64.h from x86.

>
> Thanks,
> //richard
>

-- 
Anton R. Ivanov
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