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Re: [Xen-devel] Re: how to avoid lost trace records?
| To: | Olaf Hering <olaf@xxxxxxxxx>, George Dunlap <dunlapg@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Re: how to avoid lost trace records? |
| From: | Keir Fraser <keir@xxxxxxx> |
| Date: | Thu, 25 Nov 2010 22:27:38 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 25 Nov 2010 14:28:37 -0800 |
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| Thread-topic: | [Xen-devel] Re: how to avoid lost trace records? |
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On 25/11/2010 21:04, "Olaf Hering" <olaf@xxxxxxxxx> 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
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