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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: balbir@linux.vnet.ibm.com
Cc: Minchan Kim <minchan.kim@gmail.com>,
	linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@kernel.dk,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	kosaki.motohiro@jp.fujitsu.com, cl@linux.com
Subject: Re: [PATCH 3/3] Provide control over unmapped pages (v4)
Date: Fri, 28 Jan 2011 17:17:44 +0900	[thread overview]
Message-ID: <20110128171744.b7b37703.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20110128081928.GC5054@balbir.in.ibm.com>

On Fri, 28 Jan 2011 13:49:28 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2011-01-28 16:56:05]:
 
> > BTW, it seems this doesn't work when some apps use huge shmem.
> > How to handle the issue ?
> >
> 
> Could you elaborate further? 
> 
==
static inline unsigned long zone_unmapped_file_pages(struct zone *zone)
{
        unsigned long file_mapped = zone_page_state(zone, NR_FILE_MAPPED);
        unsigned long file_lru = zone_page_state(zone, NR_INACTIVE_FILE) +
                zone_page_state(zone, NR_ACTIVE_FILE);

        /*
         * It's possible for there to be more file mapped pages than
         * accounted for by the pages on the file LRU lists because
         * tmpfs pages accounted for as ANON can also be FILE_MAPPED
         */
        return (file_lru > file_mapped) ? (file_lru - file_mapped) : 0;
}
==

Did you read ?

Thanks,
-Kame


WARNING: multiple messages have this Message-ID (diff)
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: balbir@linux.vnet.ibm.com
Cc: Minchan Kim <minchan.kim@gmail.com>,
	linux-mm@kvack.org, akpm@linux-foundation.org, npiggin@kernel.dk,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	kosaki.motohiro@jp.fujitsu.com, cl@linux.com
Subject: Re: [PATCH 3/3] Provide control over unmapped pages (v4)
Date: Fri, 28 Jan 2011 17:17:44 +0900	[thread overview]
Message-ID: <20110128171744.b7b37703.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20110128081928.GC5054@balbir.in.ibm.com>

On Fri, 28 Jan 2011 13:49:28 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2011-01-28 16:56:05]:
 
> > BTW, it seems this doesn't work when some apps use huge shmem.
> > How to handle the issue ?
> >
> 
> Could you elaborate further? 
> 
==
static inline unsigned long zone_unmapped_file_pages(struct zone *zone)
{
        unsigned long file_mapped = zone_page_state(zone, NR_FILE_MAPPED);
        unsigned long file_lru = zone_page_state(zone, NR_INACTIVE_FILE) +
                zone_page_state(zone, NR_ACTIVE_FILE);

        /*
         * It's possible for there to be more file mapped pages than
         * accounted for by the pages on the file LRU lists because
         * tmpfs pages accounted for as ANON can also be FILE_MAPPED
         */
        return (file_lru > file_mapped) ? (file_lru - file_mapped) : 0;
}
==

Did you read ?

Thanks,
-Kame

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  reply	other threads:[~2011-01-28  8:24 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-25  5:10 [PATCH 1/2] Refactor zone_reclaim code (v4) Balbir Singh
2011-01-25  5:10 ` Balbir Singh
2011-01-25  5:10 ` [PATCH 3/3] Provide control over unmapped pages (v4) Balbir Singh
2011-01-25  5:10   ` Balbir Singh
2011-01-26 16:57   ` Christoph Lameter
2011-01-26 16:57     ` Christoph Lameter
2011-01-26 17:43     ` Balbir Singh
2011-01-26 17:43       ` Balbir Singh
2011-01-26 23:12   ` Minchan Kim
2011-01-26 23:12     ` Minchan Kim
2011-01-28  2:56     ` Balbir Singh
2011-01-28  2:56       ` Balbir Singh
2011-01-28  5:44       ` Minchan Kim
2011-01-28  5:44         ` Minchan Kim
2011-01-28  6:48         ` Balbir Singh
2011-01-28  6:48           ` Balbir Singh
2011-01-28  6:48           ` Balbir Singh
2011-01-28  7:24           ` Minchan Kim
2011-01-28  7:24             ` Minchan Kim
2011-01-28  7:56             ` KAMEZAWA Hiroyuki
2011-01-28  7:56               ` KAMEZAWA Hiroyuki
2011-01-28  7:56               ` KAMEZAWA Hiroyuki
2011-01-28  8:19               ` Balbir Singh
2011-01-28  8:19                 ` Balbir Singh
2011-01-28  8:19                 ` Balbir Singh
2011-01-28  8:17                 ` KAMEZAWA Hiroyuki [this message]
2011-01-28  8:17                   ` KAMEZAWA Hiroyuki
2011-01-28 12:02                   ` Balbir Singh
2011-01-28 12:02                     ` Balbir Singh
2011-01-28 15:20               ` Christoph Lameter
2011-01-28 15:20                 ` Christoph Lameter
2011-01-30 23:58                 ` KAMEZAWA Hiroyuki
2011-01-30 23:58                   ` KAMEZAWA Hiroyuki
2011-01-31  4:37                   ` Balbir Singh
2011-01-31  4:37                     ` Balbir Singh
2011-01-28 11:18             ` Balbir Singh
2011-01-28 11:18               ` Balbir Singh
2011-02-10  5:33               ` Minchan Kim
2011-02-10  5:33                 ` Minchan Kim
2011-02-10  5:41                 ` Minchan Kim
2011-02-10  5:41                   ` Minchan Kim
2011-02-13 17:33                   ` Balbir Singh
2011-02-13 17:33                     ` Balbir Singh
2011-02-16 23:45                     ` Minchan Kim
2011-02-16 23:45                       ` Minchan Kim
2011-01-25  5:15 ` [PATCH 1/2] Refactor zone_reclaim code (v4) Balbir Singh
2011-01-25  5:15   ` Balbir Singh

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