From: Paul Walmsley <paul.walmsley@sifive.com>
To: Atish Patra <atish.patra@wdc.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>,
Anup Patel <Anup.Patel@wdc.com>,
linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@sifive.com>,
linux-riscv@lists.infradead.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v4 0/3] Optimize tlbflush path
Date: Thu, 24 Oct 2019 20:09:40 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.9999.1910242001550.28076@viisi.sifive.com> (raw)
In-Reply-To: <alpine.DEB.2.21.9999.1908301939300.16731@viisi.sifive.com>
On Fri, 30 Aug 2019, Paul Walmsley wrote:
> On Thu, 22 Aug 2019, Atish Patra wrote:
>
> > This series adds few optimizations to reduce the trap cost in the tlb
> > flush path. We should only make SBI calls to remote tlb flush only if
> > absolutely required.
>
> The patches look great. My understanding is that these optimization
> patches may actually be a partial workaround for the TLB flushing bug that
> we've been looking at for the last month or so, which can corrupt memory
> or crash the system.
I don't think we're any closer to root-causing this issue. Meanwhile,
OpenSBI has merged patches to work around it. So since many of us have
looked at Atish's TLB optimization patches, and we all think they are
useful optimizations, let's plan to merge it for v5.5-rc1.
- Paul
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next prev parent reply other threads:[~2019-10-25 3:09 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 7:51 [PATCH v4 0/3] Optimize tlbflush path Atish Patra
2019-08-22 7:51 ` [PATCH v4 1/3] RISC-V: Do not invoke SBI call if cpumask is empty Atish Patra
2019-08-22 8:10 ` Christoph Hellwig
2019-08-22 7:51 ` [PATCH v4 2/3] RISC-V: Issue a local tlbflush if possible Atish Patra
2019-08-22 8:10 ` Christoph Hellwig
2019-08-22 7:51 ` [PATCH v4 3/3] RISC-V: Issue a tlb page flush " Atish Patra
2019-08-22 8:11 ` Christoph Hellwig
2019-08-22 18:31 ` Atish Patra
2019-08-31 2:50 ` [PATCH v4 0/3] Optimize tlbflush path Paul Walmsley
2019-09-28 4:23 ` Atish Patra
2019-10-25 3:09 ` Paul Walmsley [this message]
2019-10-31 15:13 ` Atish Patra
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