linux-kernel - Re: [PATCH v4 2/3] RISC-V: Issue a local tlbflush if possible.

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Message-ID: <20190822081054.GB17573@lst.de>
Date:   Thu, 22 Aug 2019 10:10:54 +0200
From:   Christoph Hellwig <hch@....de>
To:     Atish Patra <atish.patra@....com>
Cc:     linux-kernel@...r.kernel.org, Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Christoph Hellwig <hch@....de>, Anup Patel <Anup.Patel@....com>
Subject: Re: [PATCH v4 2/3] RISC-V: Issue a local tlbflush if possible.

On Thu, Aug 22, 2019 at 12:51:50AM -0700, Atish Patra wrote:
> In RISC-V, tlb flush happens via SBI which is expensive. If the local
> cpu is the only cpu in cpumask, there is no need to invoke a SBI call.
> 
> Just do a local flush and return.
> 
> Signed-off-by: Atish Patra <atish.patra@....com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>