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Subject: Re: mm: pages are not freed from lru_add_pvecs after process
 termination
To: Dave Hansen <dave.hansen@intel.com>,
        "Odzioba, Lukasz" <lukasz.odzioba@intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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References: <D6EDEBF1F91015459DB866AC4EE162CC023AEF26@IRSMSX103.ger.corp.intel.com>
 <5720F2A8.6070406@intel.com>
Cc: "Shutemov, Kirill" <kirill.shutemov@intel.com>,
        "Anaczkowski, Lukasz" <lukasz.anaczkowski@intel.com>
From: Vlastimil Babka <vbabka@suse.cz>
Message-ID: <572766A7.9090406@suse.cz>
Date: Mon, 2 May 2016 16:39:35 +0200
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On 04/27/2016 07:11 PM, Dave Hansen wrote:
> 6. Perhaps don't use the LRU pagevecs for large pages.  It limits the
>     severity of the problem.

I think that makes sense. Being large already amortizes the cost per 
base page much more than pagevecs do (512 vs ~22 pages?).

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Subject: Re: mm: pages are not freed from lru_add_pvecs after process
 termination
References: <D6EDEBF1F91015459DB866AC4EE162CC023AEF26@IRSMSX103.ger.corp.intel.com>
 <5720F2A8.6070406@intel.com>
From: Vlastimil Babka <vbabka@suse.cz>
Message-ID: <572766A7.9090406@suse.cz>
Date: Mon, 2 May 2016 16:39:35 +0200
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To: Dave Hansen <dave.hansen@intel.com>, "Odzioba, Lukasz" <lukasz.odzioba@intel.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: "Shutemov, Kirill" <kirill.shutemov@intel.com>, "Anaczkowski, Lukasz" <lukasz.anaczkowski@intel.com>

On 04/27/2016 07:11 PM, Dave Hansen wrote:
> 6. Perhaps don't use the LRU pagevecs for large pages.  It limits the
>     severity of the problem.

I think that makes sense. Being large already amortizes the cost per 
base page much more than pagevecs do (512 vs ~22 pages?).

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