linux-kernel - Re: [PATCH v14 22/22] arm64: mm: Display non-present entries in ptdump

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Date:   Wed, 30 Oct 2019 16:50:54 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Steven Price <steven.price@....com>
Cc:     linux-mm@...ck.org, Andy Lutomirski <luto@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        James Morse <james.morse@....com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will@...nel.org>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mark Rutland <Mark.Rutland@....com>,
        "Liang, Kan" <kan.liang@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v14 22/22] arm64: mm: Display non-present entries in
 ptdump

On Mon, Oct 28, 2019 at 01:59:10PM +0000, Steven Price wrote:
> Previously the /sys/kernel/debug/kernel_page_tables file would only show
> lines for entries present in the page tables. However it is useful to
> also show non-present entries as this makes the size and level of the
> holes more visible. This aligns the behaviour with x86 which also shows
> holes.
> 
> Signed-off-by: Steven Price <steven.price@....com>

Acked-by: Catalin Marinas <catalin.marinas@....com>