linux-kernel - Re: [RFC PATCH 0/7] mm: Get rid of vmalloc_sync

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Message-ID: <20200511165045.36198080@gandalf.local.home>
Date:   Mon, 11 May 2020 16:50:45 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Joerg Roedel <jroedel@...e.de>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Joerg Roedel <joro@...tes.org>, X86 ML <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [RFC PATCH 0/7] mm: Get rid of vmalloc_sync_(un)mappings()

On Mon, 11 May 2020 21:14:14 +0200
Joerg Roedel <jroedel@...e.de> wrote:

> > Or maybe we don't want to defeature this much, or maybe the memory hit
> > from this preallocation will hurt little 2-level 32-bit systems too
> > much.  
> 
> It will certainly make Linux less likely to boot on low-memory x86-32
> systems, whoever will be affected by this.

That may be an issue, as I'm guessing the biggest users of x86-32, is
probably small systems that uses Intel's attempts at the embedded space.

-- Steve