linux-kernel - Re: [External] Re: [PATCH] RISC-V: add uniprocessor flush_tlb

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Message-ID: <CAEEQ3wnSN8dLh3FcmHq5yPwQRdjLQa_VjcuTH+7YYZLOqCzaCQ@mail.gmail.com>
Date: Mon, 29 Jan 2024 16:26:57 +0800
From: yunhui cui <cuiyunhui@...edance.com>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu, 
	alexghiti@...osinc.com, samuel.holland@...ive.com, ajones@...tanamicro.com, 
	mchitale@...tanamicro.com, dylan@...estech.com, 
	sergey.matyukevich@...tacore.com, prabhakar.mahadev-lad.rj@...renesas.com, 
	apatel@...tanamicro.com, linux-riscv@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [External] Re: [PATCH] RISC-V: add uniprocessor flush_tlb_range() support

Hi Jisheng,

On Mon, Jan 29, 2024 at 4:02 PM Jisheng Zhang <jszhang@...nel.org> wrote:
>
> On Thu, Jan 25, 2024 at 02:20:44PM +0800, Yunhui Cui wrote:
> > Add support for flush_tlb_range() to improve TLB performance for
> > UP systems. In order to avoid the mutual inclusion of tlbflush.h
> > and hugetlb.h, the UP part is also implemented in tlbflush.c.
>
> Hi Yunhui,
>
> IIRC, Samuel sent similar patch series a few weeks ago.
>
> https://lore.kernel.org/linux-riscv/20240102220134.3229156-1-samuel.holland@sifive.com/
>
> After that series, do you still need this patch?

Thank you for your reminder. I didn't find it before I mailed my
patch. I just looked at the content of this patch. I understand that
my patch is needed. For a single core, a more concise TLB flush logic
is needed, and it is helpful to improve performance.

Thanks,
Yunhui