From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: [PATCH] qemu-dm: add command to flush buffer cache
Date: Thu, 12 Jan 2012 19:30:34 +0100
Message-ID: <20120112183034.GA13035@aepfle.de>
References: <20120112182222.GA12596@aepfle.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
Content-Disposition: inline
In-Reply-To: <20120112182222.GA12596@aepfle.de>
List-Unsubscribe: <http://lists.xensource.com/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

On Thu, Jan 12, Olaf Hering wrote:

> Add support for a xenstore dm command to flush qemu's buffer cache.

Something like this is most likely also needed in mainline qemu.
My search in the qemu.org git web UI did not show any of the commands in
ioemu-remote, so its not clear how to forward port this change. 

Olaf


> --- ioemu-remote/xenstore.c
> +++ ioemu-remote/xenstore.c
> @@ -927,6 +927,9 @@ static void xenstore_process_dm_command_
>          do_pci_add(par);
>          free(par);
>  #endif
> +    } else if (!strncmp(command, "flush-cache", len)) {
> +        fprintf(logfile, "dm-command: flush caches\n");
> +        qemu_invalidate_map_cache();
>      } else {
>          fprintf(logfile, "dm-command: unknown command\"%*s\"\n", len, command);
>      }