From: Andrew Morton <akpm@linux-foundation.org>
To: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>,
Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm: hide per-cpu lists in output of show_mem()
Date: Wed, 25 Feb 2015 13:44:26 -0800 [thread overview]
Message-ID: <20150225134426.d907ecb7130d12dc8ad97c90@linux-foundation.org> (raw)
In-Reply-To: <CALYGNiO8Y3oJbPMF8m2ndtBp5=RBiw3o6rKyWsGXF0RyT9JYVQ@mail.gmail.com>
On Tue, 24 Feb 2015 13:03:01 +0400 Konstantin Khlebnikov <koct9i@gmail.com> wrote:
> On Mon, Feb 23, 2015 at 5:37 PM, Michal Hocko <mhocko@suse.cz> wrote:
> > On Fri 20-02-15 17:39:42, Konstantin Khlebnikov wrote:
> >> This makes show_mem() much less verbose at huge machines. Instead of
> >> huge and almost useless dump of counters for each per-zone per-cpu
> >> lists this patch prints sum of these counters for each zone (free_pcp)
> >> and size of per-cpu list for current cpu (local_pcp).
> >
> > I like this! I do not remember when I found this information useful
> > while debugging either an allocation failure warning or OOM killer
> > report.
> >
> >> Flag SHOW_MEM_PERCPU_LISTS reverts old verbose mode.
> >
> > Nobody seems to be using this flag so why bother?
>
> Yes. But this might be important for architectures which has asymmetrical
> memory topology, I've heard about unicorns like that.
Please provide more details about this (why important? How would it
be used) and I'll add it to the changelog.
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next prev parent reply other threads:[~2015-02-25 21:44 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-20 14:39 Konstantin Khlebnikov
2015-02-20 14:40 ` Konstantin Khlebnikov
2015-02-20 21:45 ` Andrew Morton
2015-02-23 14:37 ` Michal Hocko
2015-02-24 9:03 ` Konstantin Khlebnikov
2015-02-25 21:44 ` Andrew Morton [this message]
2015-02-26 6:14 ` [PATCH] mm: completely remove dumping per-cpu lists from show_mem() Konstantin Khlebnikov
2015-02-26 23:14 ` Dave Hansen
2015-02-24 20:41 ` [PATCH] mm: hide per-cpu lists in output of show_mem() David Rientjes
2015-02-24 22:05 ` Konstantin Khlebnikov
2015-02-24 22:31 ` David Rientjes
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