From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: Re: how to avoid lost trace records?
Date: Thu, 25 Nov 2010 22:27:38 +0000
Message-ID: <C914935A.B229%keir@xen.org>
References: <20101125210408.GA16766@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>
In-Reply-To: <20101125210408.GA16766@aepfle.de>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/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: Olaf Hering <olaf@aepfle.de>, George Dunlap <dunlapg@umich.edu>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

On 25/11/2010 21:04, "Olaf Hering" <olaf@aepfle.de> wrote:

> --- xen-unstable.hg-4.1.22415.orig/xen/common/trace.c
> +++ xen-unstable.hg-4.1.22415/xen/common/trace.c
> @@ -48,7 +48,8 @@ integer_param("tbuf_size", opt_tbuf_size
>  
>  /* Pointers to the meta-data objects for all system trace buffers */
>  static struct t_info *t_info;
> -#define T_INFO_PAGES 2  /* Size fixed at 2 pages for now. */
> +#define T_INFO_PAGES_ORDER 1  /* Size fixed at 2 pages for now. */
> +#define T_INFO_PAGES (1 << T_INFO_PAGES_ORDER)
>  #define T_INFO_SIZE ((T_INFO_PAGES)*(PAGE_SIZE))
>  static DEFINE_PER_CPU_READ_MOSTLY(struct t_buf *, t_bufs);
>  static DEFINE_PER_CPU_READ_MOSTLY(unsigned char *, t_data);

This patch looks like it has no effect whatsoever.

 -- Keir