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Date: Wed, 25 May 2016 18:27:07 +0100
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
        "Leizhen (ThunderTown)" <thunder.leizhen@huawei.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Tianhong Ding <dingtianhong@huawei.com>,
        Will Deacon <will.deacon@arm.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Xinwei Hu <huxinwei@huawei.com>, Zefan Li <lizefan@huawei.com>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Hanjun Guo <guohanjun@huawei.com>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/1] arm64: fix flush_cache_range
Message-ID: <20160525172705.GD19428@n2100.arm.linux.org.uk>
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On Wed, May 25, 2016 at 04:22:55PM +0100, Catalin Marinas wrote:
> That's when we realised that the CoW problem no longer exists for
> non-aliasing VIPT caches. However, the I-cache counterpart 6060e8df5178
> has not been reverted.

I think I mostly agree, except for reverting 6060e8df5178, which I don't
think would be correct.  That reintroduces the possibility of flushing
the I-cache twice in that path, once for aliasing vipt dcaches, and again
for asid tagged vivt icaches.  I'd rather have the code structured so we
only do this once.

-- 
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