linux-kernel - Re: [PATCH] efifb: allow user to disable write combined mapping.

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Message-ID: <487000e3-afeb-0e59-c563-0ef4b1347d8d@zytor.com>
Date:   Mon, 31 Jul 2017 12:13:32 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Dave Airlie <airlied@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Peter Jones <pjones@...hat.com>,
        the arch/x86 maintainers <x86@...nel.org>,
        Dave Airlie <airlied@...hat.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        "linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Lutomirski <luto@...nel.org>
Subject: Re: [PATCH] efifb: allow user to disable write combined mapping.

On 07/18/17 13:44, Dave Airlie wrote:
> 
> In normal operation the console is faster with _wc. It's the side effects
> on other cores that is the problem.
> 

I'm guessing leaving these as UC- rate-limits them so it doesn't
interfere with the I/O operations on the other cores...

	-hpa