From: Dave Hansen <dave.hansen@intel.com>
To: "Kirill A. Shutemov" <kirill@shutemov.name>,
Vlastimil Babka <vbabka@suse.cz>
Cc: "Odzioba, Lukasz" <lukasz.odzioba@intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"Shutemov, Kirill" <kirill.shutemov@intel.com>,
"Anaczkowski, Lukasz" <lukasz.anaczkowski@intel.com>
Subject: Re: mm: pages are not freed from lru_add_pvecs after process termination
Date: Mon, 2 May 2016 08:49:03 -0700 [thread overview]
Message-ID: <572776EF.2070804@intel.com> (raw)
In-Reply-To: <20160502150109.GB24419@node.shutemov.name>
On 05/02/2016 08:01 AM, Kirill A. Shutemov wrote:
> On Mon, May 02, 2016 at 04:39:35PM +0200, Vlastimil Babka wrote:
>> 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?).
>
> We try to do this already, don't we? Any spefic case where we have THPs on
> pagevecs?
Lukas was hitting this on a RHEL 7 era kernel. In his kernel at least,
I'm pretty sure THP's were ending up on pagevecs. Are you saying you
don't think we're doing that any more?
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next prev parent reply other threads:[~2016-05-02 15:49 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-27 17:01 mm: pages are not freed from lru_add_pvecs after process termination Odzioba, Lukasz
2016-04-27 17:11 ` Dave Hansen
2016-04-28 14:37 ` Michal Hocko
2016-05-02 13:00 ` Michal Hocko
2016-05-04 19:41 ` Odzioba, Lukasz
2016-05-04 20:16 ` Dave Hansen
2016-05-04 20:36 ` Michal Hocko
2016-05-05 7:21 ` Michal Hocko
2016-05-05 17:25 ` Odzioba, Lukasz
2016-05-11 7:38 ` Michal Hocko
2016-05-06 15:10 ` Odzioba, Lukasz
2016-05-06 16:04 ` Dave Hansen
2016-05-11 7:53 ` Michal Hocko
2016-05-13 11:29 ` Vlastimil Babka
2016-05-13 12:05 ` Odzioba, Lukasz
2016-06-07 9:02 ` Odzioba, Lukasz
2016-06-07 11:19 ` Michal Hocko
2016-06-08 8:51 ` Odzioba, Lukasz
2016-05-02 14:39 ` Vlastimil Babka
2016-05-02 15:01 ` Kirill A. Shutemov
2016-05-02 15:13 ` Vlastimil Babka
2016-05-02 15:49 ` Dave Hansen [this message]
2016-05-02 16:02 ` Kirill A. Shutemov
2016-05-03 7:37 ` Michal Hocko
2016-05-03 10:07 ` Kirill A. Shutemov
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