From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:60371)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <lukeshu@lukeshu.com>) id 1ejyRX-00075N-R1
	for qemu-devel@nongnu.org; Thu, 08 Feb 2018 21:29:40 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <lukeshu@lukeshu.com>) id 1ejyRT-0000l4-Kz
	for qemu-devel@nongnu.org; Thu, 08 Feb 2018 21:29:39 -0500
Received: from mav.lukeshu.com ([104.207.138.63]:42890)
	by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)
	(Exim 4.71) (envelope-from <lukeshu@lukeshu.com>) id 1ejyRT-0000jZ-Gg
	for qemu-devel@nongnu.org; Thu, 08 Feb 2018 21:29:35 -0500
Date: Thu, 08 Feb 2018 21:29:26 -0500
Message-ID: <87mv0i6gl5.wl-lukeshu@lukeshu.com>
From: Luke Shumaker <lukeshu@lukeshu.com>
In-Reply-To: <20171228180814.9749-1-lukeshu@lukeshu.com>
References: <20171228180814.9749-1-lukeshu@lukeshu.com>
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset=US-ASCII
Subject: Re: [Qemu-devel] [PATCH 00/10] linux-user: Speed up guest space
 initialization on 32-bit ARM target
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel/>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org
Cc: Riku Voipio <riku.voipio@iki.fi>, Laurent Vivier <laurent@vivier.eu>

Ping.

On Thu, 28 Dec 2017 13:08:03 -0500,
Luke Shumaker wrote:
> 
> From: Luke Shumaker <lukeshu@parabola.nu>
> 
> The goal of this patchset is to fix
> https://bugs.launchpad.net/qemu/+bug/1740219
> 
> The gist is that the current linear search for an acceptable address
> range is a bad strategy when the reason we didn't get a good address
> on the first try is that we've having problems mapping the commpage
> for the 32-bit ARM target; especially if ASLR is disabled.
> 
> I think that only the final patch in this patchset is actually
> necessary to fix the issue; but I didn't feel comfortable writing it
> without also makeing the preceding (small) changes.
> 
> Luke Shumaker (10):
>   linux-user: Use #if to only call validate_guest_space for 32-bit ARM
>     target
>   linux-user: Rename validate_guest_space => init_guest_commpage
>   linux-user: init_guest_space: Clean up if we can't initialize the
>     commpage
>   linux-user: init_guest_space: Correctly handle guest_start in commpage
>     initialization
>   linux-user: init_guest_space: Clarify page alignment logic
>   linux-user: init_guest_commpage: Add a comment about size check
>   linux-user: init_guest_space: Clean up control flow a bit
>   linux-user: init_guest_space: Don't try to align if we'll reject it
>   linux-user: init_guest_space: Add a comment about search strategy
>   linux-user: init_guest_space: Try to make ARM space+commpage
>     continuous
> 
>  linux-user/elfload.c | 145 ++++++++++++++++++++++++++++++++++++++++-----------
>  1 file changed, 114 insertions(+), 31 deletions(-)
> 
> -- 
> 2.15.1
> 
> Happy hacking,
> ~ Luke Shumaker
>