linux-kernel - Re: [PATCH 11/13] BC: vmrss (preparations)

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Date:	Wed, 06 Sep 2006 00:09:41 +0200
From:	Cedric Le Goater <clg@...ibm.com>
To:	Kirill Korotaev <dev@...ru>
CC:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	Rik van Riel <riel@...hat.com>, Andi Kleen <ak@...e.de>,
	Oleg Nesterov <oleg@...sign.ru>,
	Alexey Dobriyan <adobriyan@...l.ru>,
	Matt Helsley <matthltc@...ibm.com>,
	CKRM-Tech <ckrm-tech@...ts.sourceforge.net>,
	Hugh Dickins <hugh@...itas.com>
Subject: Re: [PATCH 11/13] BC: vmrss (preparations)

Kirill Korotaev wrote:

<snip>

> --- ./include/bc/beancounter.h.bcvmrssprep    2006-09-05
> 13:17:50.000000000 +0400
> +++ ./include/bc/beancounter.h    2006-09-05 13:44:33.000000000 +0400
> @@ -45,6 +45,13 @@ struct bc_resource_parm {
> #define BC_MAXVALUE    LONG_MAX
> 
> /*
> + * This magic is used to distinuish user beancounter and pages beancounter
> + * in struct page. page_ub and page_bc are placed in union and MAGIC
> + * ensures us that we don't use pbc as ubc in bc_page_uncharge().
> + */
> +#define BC_MAGIC                0x62756275UL
> +
> +/*
>  *    Resource management structures
>  * Serialization issues:
>  *   beancounter list management is protected via bc_hash_lock
> @@ -54,11 +61,13 @@ struct bc_resource_parm {
>  */
> 
> struct beancounter {
> +    unsigned long        bc_magic;
>     atomic_t        bc_refcount;
>     spinlock_t        bc_lock;
>     bcid_t            bc_id;
>     struct hlist_node    hash;
> 
> +    unsigned long        unused_privvmpages;
>     /* resources statistics and settings */
>     struct bc_resource_parm    bc_parms[BC_RESOURCES];
> };
> @@ -74,6 +83,8 @@ enum bc_severity { BC_BARRIER, BC_LIMIT,
> 
> #ifdef CONFIG_BEANCOUNTERS
> 
> +extern unsigned int nr_beancounters = 1;
> +

my gcc doesn't like this one ...

regards,

C.

Signed-off-by: Cedric Le Goater <clg@...ibm.com>

---
 include/bc/beancounter.h |    2 +-
 kernel/bc/beancounter.c  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Index: 2.6.18-rc5-mm1/include/bc/beancounter.h
===================================================================
--- 2.6.18-rc5-mm1.orig/include/bc/beancounter.h
+++ 2.6.18-rc5-mm1/include/bc/beancounter.h
@@ -86,7 +86,7 @@ enum bc_severity { BC_BARRIER, BC_LIMIT,

 #ifdef CONFIG_BEANCOUNTERS

-extern unsigned int nr_beancounters = 1;
+extern unsigned int nr_beancounters;

 /*
  * These functions tune minheld and maxheld values for a given
Index: 2.6.18-rc5-mm1/kernel/bc/beancounter.c
===================================================================
--- 2.6.18-rc5-mm1.orig/kernel/bc/beancounter.c
+++ 2.6.18-rc5-mm1/kernel/bc/beancounter.c
@@ -20,7 +20,7 @@ static void init_beancounter_struct(stru

 struct beancounter init_bc;

-unsigned int nr_beancounters;
+unsigned int nr_beancounters = 1;

 const char *bc_rnames[] = {
 	"kmemsize",	/* 0 */
-
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