linux-kernel - Re: [PATCH v3 1/7] mm: Add functions to track page directory modifications

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Message-ID: <20200605114654.GD31371@gaia>
Date:   Fri, 5 Jun 2020 12:46:55 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     x86@...nel.org, hpa@...or.com,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>, rjw@...ysocki.net,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Joerg Roedel <jroedel@...e.de>, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-mm@...ck.org, Will Deacon <will@...nel.org>
Subject: Re: [PATCH v3 1/7] mm: Add functions to track page directory
 modifications

On Fri, Jun 05, 2020 at 11:08:13AM +0100, Catalin Marinas wrote:
> This patch causes a kernel panic on arm64 (and possibly powerpc, I
> haven't tried). arm64 still uses the 5level-fixup.h and pud_alloc()
> checks for the empty p4d with pgd_none() instead of p4d_none().

Ah, should have checked the list first
(https://lore.kernel.org/linux-mm/20200604074446.23944-1-joro@8bytes.org/).

Please ignore my patch then.

-- 
Catalin