linux-kernel - Re: [PATCH v3 2/3] ioremap: Update pgtable free interfaces with addr

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Message-ID: <20180517064755.GP12670@dhcp22.suse.cz>
Date:   Thu, 17 May 2018 08:47:55 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Toshi Kani <toshi.kani@....com>
Cc:     akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, cpandya@...eaurora.org, linux-mm@...ck.org,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH v3 2/3] ioremap: Update pgtable free interfaces with addr

On Wed 16-05-18 17:32:06, Kani Toshimitsu wrote:
> From: Chintan Pandya <cpandya@...eaurora.org>
> 
> This patch ("mm/vmalloc: Add interfaces to free unmapped
> page table") adds following 2 interfaces to free the page
> table in case we implement huge mapping.
> 
> pud_free_pmd_page() and pmd_free_pte_page()
> 
> Some architectures (like arm64) needs to do proper TLB
> maintanance after updating pagetable entry even in map.
> Why ? Read this,
> https://patchwork.kernel.org/patch/10134581/

Please add that information to the changelog.
-- 
Michal Hocko
SUSE Labs