From: Michel Lespinasse <walken@google.com>
To: Vladimir Davydov <vdavydov@parallels.com>
Cc: Michal Hocko <mhocko@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andres Lagar-Cavilla <andreslc@google.com>,
Minchan Kim <minchan@kernel.org>,
Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Greg Thelen <gthelen@google.com>,
David Rientjes <rientjes@google.com>,
Pavel Emelyanov <xemul@parallels.com>,
Cyrill Gorcunov <gorcunov@openvz.org>,
Jonathan Corbet <corbet@lwn.net>,
linux-api@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -mm v9 0/8] idle memory tracking
Date: Wed, 29 Jul 2015 08:34:52 -0700 [thread overview]
Message-ID: <CANN689GNzwjc5AsAfSGRWM=Tr=ouHSgJ76fSvvPvA_hmiGjFSA@mail.gmail.com> (raw)
In-Reply-To: <20150729153135.GW8100@esperanza>
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On Wed, Jul 29, 2015 at 8:31 AM, Vladimir Davydov <vdavydov@parallels.com>
wrote:
> On Wed, Jul 29, 2015 at 08:08:22AM -0700, Michel Lespinasse wrote:
> > On Wed, Jul 29, 2015 at 7:45 AM, Vladimir Davydov <
> vdavydov@parallels.com>
> > wrote:
> > > Page table scan approach has the inherent problem - it ignores unmapped
> > > page cache. If a workload does a lot of read/write or map-access-unmap
> > > operations, we won't be able to even roughly estimate its wss.
> >
> > You can catch that in mark_page_accessed on those paths, though.
>
> Actually, the problem here is how to find an unmapped page cache page
> *to mark it idle*, not to mark it accessed.
>
Ah, yes.
When I tried that I was still scanning memory by address at the end just to
compute such totals - but I did not have to do rmap at that point anymore.
It did look incredibly lame, though.
--
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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next prev parent reply other threads:[~2015-07-29 15:34 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-19 12:31 Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 1/8] memcg: add page_cgroup_ino helper Vladimir Davydov
2015-07-21 23:34 ` Andrew Morton
2015-07-22 9:21 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 2/8] hwpoison: use page_cgroup_ino for filtering by memcg Vladimir Davydov
2015-07-21 23:34 ` Andrew Morton
2015-07-22 9:45 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 3/8] memcg: zap try_get_mem_cgroup_from_page Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 4/8] proc: add kpagecgroup file Vladimir Davydov
2015-07-21 23:34 ` Andrew Morton
2015-07-22 10:33 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 5/8] mmu-notifier: add clear_young callback Vladimir Davydov
2015-07-20 18:34 ` Andres Lagar-Cavilla
2015-07-21 8:51 ` Vladimir Davydov
2015-07-22 16:33 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 6/8] proc: add kpageidle file Vladimir Davydov
2015-07-21 23:34 ` Andrew Morton
2015-07-22 15:20 ` Vladimir Davydov
2015-07-24 14:08 ` Paul Gortmaker
2015-07-24 14:17 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 7/8] proc: export idle flag via kpageflags Vladimir Davydov
2015-07-21 23:35 ` Andrew Morton
2015-07-22 16:25 ` Vladimir Davydov
2015-07-22 19:44 ` Andrew Morton
2015-07-22 20:46 ` Andres Lagar-Cavilla
2015-07-23 7:57 ` Vladimir Davydov
2015-07-19 12:31 ` [PATCH -mm v9 8/8] proc: add cond_resched to /proc/kpage* read/write loop Vladimir Davydov
2015-07-19 12:37 ` [PATCH -mm v9 0/8] idle memory tracking Vladimir Davydov
2015-07-21 21:39 ` Andres Lagar-Cavilla
2015-07-21 23:34 ` Andrew Morton
2015-07-22 16:23 ` Vladimir Davydov
2015-07-25 16:24 ` Vladimir Davydov
2015-07-27 19:18 ` Kees Cook
2015-07-27 19:25 ` Andrew Morton
2015-07-29 12:36 ` Michal Hocko
2015-07-29 13:59 ` Vladimir Davydov
2015-07-29 14:12 ` Michel Lespinasse
2015-07-29 14:13 ` Michel Lespinasse
2015-07-29 14:45 ` Vladimir Davydov
2015-07-29 15:08 ` Michel Lespinasse
2015-07-29 15:31 ` Vladimir Davydov
2015-07-29 15:34 ` Michel Lespinasse [this message]
2015-07-29 15:08 ` Michal Hocko
2015-07-29 15:36 ` Vladimir Davydov
2015-07-29 15:58 ` Michal Hocko
2015-07-29 14:26 ` Michal Hocko
2015-07-29 15:28 ` Vladimir Davydov
2015-07-29 15:47 ` Michal Hocko
2015-07-29 16:29 ` Vladimir Davydov
2015-07-29 21:30 ` Andrew Morton
2015-07-30 9:12 ` Vladimir Davydov
2015-07-30 13:01 ` Vladimir Davydov
2015-07-31 9:34 ` Vladimir Davydov
2015-07-30 9:07 ` Michal Hocko
2015-07-30 9:31 ` Vladimir Davydov
2015-07-29 15:55 ` Andres Lagar-Cavilla
2015-07-29 16:37 ` Vladimir Davydov
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