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Date: Fri, 27 Apr 2018 13:39:23 +0200
From: Michal Hocko <mhocko@kernel.org>
Subject: Re: [PATCH v2 2/2] x86/mm: implement free pmd/pte page interfaces
Message-ID: <20180427113923.GF17484@dhcp22.suse.cz>
References: <20180314180155.19492-1-toshi.kani@hpe.com>
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To: "joro@8bytes.org" <joro@8bytes.org>
Cc: "Kani, Toshi" <toshi.kani@hpe.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "bp@suse.de" <bp@suse.de>, "tglx@linutronix.de" <tglx@linutronix.de>, "linux-mm@kvack.org" <linux-mm@kvack.org>, "guohanjun@huawei.com" <guohanjun@huawei.com>, "wxf.wang@hisilicon.com" <wxf.wang@hisilicon.com>, "stable@vger.kernel.org" <stable@vger.kernel.org>, "x86@kernel.org" <x86@kernel.org>, "akpm@linux-foundation.org" <akpm@linux-foundation.org>, "willy@infradead.org" <willy@infradead.org>, "hpa@zytor.com" <hpa@zytor.com>, "catalin.marinas@arm.com" <catalin.marinas@arm.com>, "mingo@redhat.com" <mingo@redhat.com>, "will.deacon@arm.com" <will.deacon@arm.com>, "cpandya@codeaurora.org" <cpandya@codeaurora.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>

On Fri 27-04-18 09:37:20, joro@8bytes.org wrote:
[...]
> So until we make the generic ioremap code in lib/ioremap.c smarter about
> unmapping/remapping ranges the best solution is making my fix work again
> by reverting your patch.

Could you reuse the same mmu_gather mechanism as we use in the
zap_*_range?
-- 
Michal Hocko
SUSE Labs