linux-kernel - Re: mm: pages are not freed from lru_add

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

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?).