From: Petr Cermak <petrcermak@chromium.org>
To: David Rientjes <rientjes@google.com>
Cc: Primiano Tucci <primiano@chromium.org>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Hugh Dickins <hughd@google.com>
Subject: Re: [PATCH v2 2/2] task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS)
Date: Tue, 3 Feb 2015 03:26:28 +0000 [thread overview]
Message-ID: <20150203032628.GA4006@google.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1501261552440.29252@chino.kir.corp.google.com>
On Mon, Jan 26, 2015 at 04:00:20PM -0800, David Rientjes wrote:
> [...]
> This is a result of allowing something external (process B) be able to
> clear hwm so that you never knew the value went to 100MB. That's the
> definition of a race, I don't know how to explain it any better and making
> any connection between clearing PG_referenced and mm->hiwater_rss is a
> stretch. This approach just makes mm->hiwater_rss meaningless.
I understand your concern, but I hope you agree that the functionality we
are proposing would be very useful for profiling. Therefore, I suggest
adding an extra resettable field to /proc/pid/status (e.g.
resettable_hiwater_rss) instead. What is your view on this approach?
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-02-03 3:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-07 17:06 [PATCH v2 0/2] task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS) Petr Cermak
2015-01-07 17:06 ` [PATCH v2 1/2] task_mmu: Reduce excessive indentation in clear_refs_write Petr Cermak
2015-01-07 17:06 ` [PATCH v2 2/2] task_mmu: Add user-space support for resetting mm->hiwater_rss (peak RSS) Petr Cermak
2015-01-07 17:24 ` Kirill A. Shutemov
2015-01-14 15:22 ` Petr Cermak
2015-01-14 23:36 ` Kirill A. Shutemov
2015-01-21 22:58 ` David Rientjes
2015-01-22 0:22 ` Primiano Tucci
2015-01-22 23:27 ` David Rientjes
2015-01-23 0:28 ` Primiano Tucci
2015-01-27 0:00 ` David Rientjes
2015-02-03 3:26 ` Petr Cermak [this message]
2015-02-03 15:51 ` Minchan Kim
2015-02-03 20:16 ` David Rientjes
2015-01-14 23:39 ` Kirill A. Shutemov
2015-01-15 16:46 ` Petr Cermak
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=20150203032628.GA4006@google.com \
--to=petrcermak@chromium.org \
--cc=akpm@linux-foundation.org \
--cc=bhelgaas@google.com \
--cc=hughd@google.com \
--cc=kirill@shutemov.name \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=primiano@chromium.org \
--cc=rientjes@google.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).