Re: [PATCH v6] Unified trace buffer

[Peter Zijlstra <peterz@infradead.org>]

On Fri, 2008-09-26 at 14:05 -0400, Steven Rostedt wrote:

> +struct buffer_page {
> +	u64		time_stamp;
> +	unsigned char	body[];
> +};
> +
> +#define BUF_PAGE_SIZE (PAGE_SIZE - sizeof(u64))

Since you're already using the page frame, you can stick this per page
timestamp in there as well, and get the full page for data.

You can either use a struct page overlay like slob does, or add a u64 in
the union that contains struct {private, mapping}.