linux-kernel - Re: [PATCH 3/3][RFC] Containers: Pagecache controller reclaim

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Date:	06 Mar 2007 12:24:33 +0200
From:	Kari Hurtta <hurtta+gmane@...lo.fmi.fi>
To:	linux-kernel@...r.kernel.org
Cc:	linux-mm@...ck.org
Subject:  Re: [PATCH 3/3][RFC] Containers: Pagecache controller reclaim

Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com> writes
in gmane.linux.kernel,gmane.linux.kernel.mm:

> --- linux-2.6.20.orig/mm/pagecache_acct.c
> +++ linux-2.6.20/mm/pagecache_acct.c
> @@ -29,6 +29,7 @@
>  #include <linux/uaccess.h>
>  #include <asm/div64.h>
>  #include <linux/pagecache_acct.h>
> +#include <linux/memcontrol.h>
> 
>  /*
>   * Convert unit from pages to kilobytes
> @@ -337,12 +338,20 @@ int pagecache_acct_cont_overlimit(struct
>  		return 0;
>  }
> 
> -extern unsigned long shrink_all_pagecache_memory(unsigned long nr_pages);
> +extern unsigned long shrink_container_memory(unsigned int memory_type,
> +				unsigned long nr_pages, void *container);
> 
>  int pagecache_acct_shrink_used(unsigned long nr_pages)
>  {
>  	unsigned long ret = 0;
>  	atomic_inc(&reclaim_count);
> +
> +	/* Don't call reclaim for each page above limit */
> +	if (nr_pages > NR_PAGES_RECLAIM_THRESHOLD) {
> +		ret += shrink_container_memory(
> +				RECLAIM_PAGECACHE_MEMORY, nr_pages, NULL);
> +	}
> +
>  	return 0;
>  }
> 

'ret' is not used ?

/ Kari Hurtta

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