Re: [PATCH RFC 00/28] ARM: Switch to generic entry

From: Russell King (Oracle)
Date: Thu Oct 10 2024 - 07:55:54 EST


On Thu, Oct 10, 2024 at 01:33:38PM +0200, Linus Walleij wrote:
> This patch series converts a slew of ARM assembly into the
> corresponding C code, step by step moving the codebase
> closer to the expectations of the generic entry code,
> and as a last step switches ARM over to the generic
> entry code.

I haven't looked at the series yet, but I guess we're throwing away
all the effort I put in to make stuff like syscalls as fast as
possible.

So the question is... do we want performance, or do we want generic
(and slower) code?

It seems insane to me that we spend time micro-optimising things like
memcpy, memset, divide routines, but then go and throw away performance
that applications actually rely upon, such as syscall performance.

--
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