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

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Message-ID: <572A58AB.6090106@intel.com>
Date:	Wed, 4 May 2016 13:16:43 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	"Odzioba, Lukasz" <lukasz.odzioba@...el.com>,
	Michal Hocko <mhocko@...nel.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"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 05/04/2016 12:41 PM, Odzioba, Lukasz wrote:
> Do you see any advantages of dropping THP from pagevecs over this solution?

It's a more foolproof solution.  Even with this patch, there might still
be some corner cases where the draining doesn't occur.  That "two
minutes" might be come 20 or 200 under some circumstances.