Re: [Xenomai-core] [PATCH] ipipe-tracer-v5

[Jan Kiszka <jan.kiszka@domain.hid>]

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Jan Kiszka wrote:
> ------------------------------------------------------------------------
> 
> --- linux-2.6.14.3/arch/i386/boot/compressed/misc.c.orig	2005-11-24 23:10:21.000000000 +0100
> +++ linux-2.6.14.3/arch/i386/boot/compressed/misc.c	2005-12-28 16:12:43.000000000 +0100
> @@ -15,6 +15,12 @@
>  #include <asm/io.h>
>  #include <asm/page.h>
>  
> +#ifdef CONFIG_IPIPE_TRACE
> +void __attribute__ ((no_instrument_function)) mcount(void)
> +{
> +}
> +#endif
> +
>  /*
>   * gzip declarations
>   */
> @@ -112,7 +118,7 @@
>  #define INPLACE_MOVE_ROUTINE  0x1000
>  #define LOW_BUFFER_START      0x2000
>  #define LOW_BUFFER_MAX       0x90000
> -#define HEAP_SIZE             0x3000
> +#define HEAP_SIZE             0x4000
>  static unsigned int low_buffer_end, low_buffer_size;
>  static int high_loaded =0;
>  static uch *high_buffer_start /* = (uch *)(((ulg)&end) + HEAP_SIZE)*/;
> @@ -125,6 +131,7 @@
>  static void * xquad_portio = NULL;
>  #endif
>  
> +#define ZLIB_INFLATE_NO_INFLATE_LOCK
>  #include "../../../../lib/inflate.c"
>  

With the recent advent of a broken-out latency trace patch for the
standard kernel, it became clear what the last patched line is for:
nothing in this case, it only makes sense as the full
reduce-zlib-stack-hack.patch available from

http://people.redhat.com/mingo/latency-tracing-patches/patches

One only need this add-on patch when running the tracing kernel with 4k
stacks.

Philippe, I think we should not merge this particular line change. In
contrast, the HEAP_SIZE change also appears in the tracer patch itself.

Jan

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