linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Mel Gorman <mgorman@techsingularity.net>
To: Alexander Duyck <alexander.duyck@gmail.com>
Cc: kvm@vger.kernel.org, david@redhat.com, mst@redhat.com,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	akpm@linux-foundation.org, yang.zhang.wz@gmail.com,
	pagupta@redhat.com, konrad.wilk@oracle.com, nitesh@redhat.com,
	riel@surriel.com, willy@infradead.org, lcapitulino@redhat.com,
	dave.hansen@intel.com, wei.w.wang@intel.com, aarcange@redhat.com,
	pbonzini@redhat.com, dan.j.williams@intel.com, mhocko@kernel.org,
	alexander.h.duyck@linux.intel.com, vbabka@suse.cz,
	osalvador@suse.de
Subject: Re: [PATCH v17 3/9] mm: Add function __putback_isolated_page
Date: Wed, 19 Feb 2020 14:33:00 +0000	[thread overview]
Message-ID: <20200219143300.GR3466@techsingularity.net> (raw)
In-Reply-To: <20200211224624.29318.89287.stgit@localhost.localdomain>

On Tue, Feb 11, 2020 at 02:46:24PM -0800, Alexander Duyck wrote:
> From: Alexander Duyck <alexander.h.duyck@linux.intel.com>
> 
> There are cases where we would benefit from avoiding having to go through
> the allocation and free cycle to return an isolated page.
> 
> Examples for this might include page poisoning in which we isolate a page
> and then put it back in the free list without ever having actually
> allocated it.
> 
> This will enable us to also avoid notifiers for the future free page
> reporting which will need to avoid retriggering page reporting when
> returning pages that have been reported on.
> 
> Acked-by: David Hildenbrand <david@redhat.com>
> Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>

Ok, the prior code that used post_alloc_hook to make the isolated page seem
like a normally allocated page followed by a free seems strange anyway. As
well as being expensive, isolated pages can end up on the per-cpu lists
which is probably not what is desired. I *think* what you've done is ok so

Acked-by: Mel Gorman <mgorman@techsingularity.net>

-- 
Mel Gorman
SUSE Labs

  reply	other threads:[~2020-02-19 14:33 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 22:45 [PATCH v17 0/9] mm / virtio: Provide support for free page reporting Alexander Duyck
2020-02-11 22:46 ` [PATCH v17 1/9] mm: Adjust shuffle code to allow for future coalescing Alexander Duyck
2020-02-11 22:46 ` [PATCH v17 2/9] mm: Use zone and order instead of free area in free_list manipulators Alexander Duyck
2020-02-11 22:46 ` [PATCH v17 3/9] mm: Add function __putback_isolated_page Alexander Duyck
2020-02-19 14:33   ` Mel Gorman [this message]
2020-02-11 22:46 ` [PATCH v17 4/9] mm: Introduce Reported pages Alexander Duyck
2020-02-19 14:55   ` Mel Gorman
2020-02-20 18:44     ` Alexander Duyck
2020-02-20 22:35       ` Mel Gorman
2020-02-21 19:25         ` Alexander Duyck
2020-02-21 20:19           ` Mel Gorman
2020-02-11 22:46 ` [PATCH v17 5/9] virtio-balloon: Pull page poisoning config out of free page hinting Alexander Duyck
2020-02-11 22:46 ` [PATCH v17 6/9] virtio-balloon: Add support for providing free page reports to host Alexander Duyck
2020-02-11 22:47 ` [PATCH v17 7/9] mm/page_reporting: Rotate reported pages to the tail of the list Alexander Duyck
2020-02-19 14:59   ` Mel Gorman
2020-02-11 22:47 ` [PATCH v17 8/9] mm/page_reporting: Add budget limit on how many pages can be reported per pass Alexander Duyck
2020-02-19 15:02   ` Mel Gorman
2020-02-11 22:47 ` [PATCH v17 9/9] mm/page_reporting: Add free page reporting documentation Alexander Duyck
2020-02-11 22:51 ` [PATCH v17 QEMU 1/3] virtio-ballon: Implement support for page poison tracking feature Alexander Duyck
2020-02-11 22:51 ` [PATCH v17 QEMU 2/3] virtio-balloon: Add support for providing free page reports to host Alexander Duyck
2020-02-11 22:51 ` [PATCH v17 QEMU 3/3] virtio-balloon: Provide a interface for free page reporting Alexander Duyck
2020-02-11 22:53 ` [PATCH v17 QEMU 4/3 RFC] memory: Add support for MADV_FREE as mechanism to lazy discard pages Alexander Duyck
2020-02-11 23:05 ` [PATCH v17 0/9] mm / virtio: Provide support for free page reporting Andrew Morton
2020-02-11 23:55   ` Alexander Duyck
2020-02-12  0:19     ` Andrew Morton
2020-02-12  1:19       ` Alexander Duyck
2020-02-18 16:37       ` Alexander Duyck
2020-02-19  8:49         ` Mel Gorman
2020-02-19 15:06         ` Mel Gorman

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=20200219143300.GR3466@techsingularity.net \
    --to=mgorman@techsingularity.net \
    --cc=aarcange@redhat.com \
    --cc=akpm@linux-foundation.org \
    --cc=alexander.duyck@gmail.com \
    --cc=alexander.h.duyck@linux.intel.com \
    --cc=dan.j.williams@intel.com \
    --cc=dave.hansen@intel.com \
    --cc=david@redhat.com \
    --cc=konrad.wilk@oracle.com \
    --cc=kvm@vger.kernel.org \
    --cc=lcapitulino@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mhocko@kernel.org \
    --cc=mst@redhat.com \
    --cc=nitesh@redhat.com \
    --cc=osalvador@suse.de \
    --cc=pagupta@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=riel@surriel.com \
    --cc=vbabka@suse.cz \
    --cc=wei.w.wang@intel.com \
    --cc=willy@infradead.org \
    --cc=yang.zhang.wz@gmail.com \
    --subject='Re: [PATCH v17 3/9] mm: Add function __putback_isolated_page' \
    /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).