[PATCH] arm64: clear_page[s] using memset
Catalin Marinas
catalin.marinas at arm.com
Tue Apr 7 06:47:45 PDT 2026
On Tue, Apr 07, 2026 at 11:25:55AM +0200, Linus Walleij wrote:
> Quoting my own commit message hehe:
>
> > No performance regressions can be seen, the fastpath
> > benchmarks differences are in the noise.
>
> This was tested on hardware with Ryan Robert's fastpath tool.
BTW, have you tried the perf bench mmap test again with the new
clear_page? Both with single page and multiple pages scenarios. And
ideally on more than one platform.
Will pointed out (in a private chat) that current clear_page() uses
non-temporal stores while memset() doesn't. It may not make any
difference in practice but it would be good to have some numbers.
--
Catalin
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