linux-kernel - Re: [PATCH 1/2] x86: respect memory size limiting via mem= parameter

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Message-Id: <69D0866F-77A7-4529-A01E-12395106E22D@oracle.com>
Date:   Wed, 23 Jan 2019 07:35:28 -0700
From:   William Kucharski <william.kucharski@...cle.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        xen-devel <xen-devel@...ts.xenproject.org>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        sstabellini@...nel.org, hpa@...or.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de
Subject: Re: [PATCH 1/2] x86: respect memory size limiting via mem= parameter



> On Jan 22, 2019, at 1:06 AM, Juergen Gross <jgross@...e.com> wrote:
> 
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index b9a667d36c55..7fc2a87110a3 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -96,10 +96,16 @@ void mem_hotplug_done(void)
> 	cpus_read_unlock();
> }
> 
> +u64 max_mem_size = -1;

This may be pedantic, but I'd rather see U64_MAX used here.