LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
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.

  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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150225134426.d907ecb7130d12dc8ad97c90@linux-foundation.org \
    --to=akpm@linux-foundation.org \
    --cc=khlebnikov@yandex-team.ru \
    --cc=koct9i@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@suse.cz \
    --subject='Re: [PATCH] mm: hide per-cpu lists in output of show_mem()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).