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From: Michal Hocko <mhocko@kernel.org>
To: Wei Wang <wei.w.wang@intel.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
	virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
	mst@redhat.com, akpm@linux-foundation.org
Subject: Re: [PATCH v2 2/2] virtio_balloon: replace oom notifier with shrinker
Date: Thu, 2 Aug 2018 13:29:01 +0200	[thread overview]
Message-ID: <20180802112901.GH10808@dhcp22.suse.cz> (raw)
In-Reply-To: <5B62EAAC.8000505@intel.com>

On Thu 02-08-18 19:27:40, Wei Wang wrote:
> On 08/02/2018 07:00 PM, Tetsuo Handa wrote:
> > On 2018/08/02 19:32, Wei Wang wrote:
> > > On 08/01/2018 07:34 PM, Michal Hocko wrote:
> > > > Do you have any numbers for how does this work in practice?
> > > It works in this way: for example, we can set the parameter, balloon_pages_to_shrink,
> > > to shrink 1GB memory once shrink scan is called. Now, we have a 8GB guest, and we balloon
> > > out 7GB. When shrink scan is called, the balloon driver will get back 1GB memory and give
> > > them back to mm, then the ballooned memory becomes 6GB.
> > Since shrinker might be called concurrently (am I correct?),
> 
> Not sure about it being concurrently, but I think it would be called
> repeatedly as should_continue_reclaim() returns true.

Multiple direct reclaimers might indeed invoke it concurrently.
-- 
Michal Hocko
SUSE Labs

  parent reply	other threads:[~2018-08-02 11:29 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-27  9:24 [PATCH v2 0/2] virtio-balloon: some improvements Wei Wang
2018-07-27  9:24 ` [virtio-dev] " Wei Wang
2018-07-27  9:24 ` Wei Wang
2018-07-27  9:24 ` [PATCH v2 1/2] virtio-balloon: remove BUG() in init_vqs Wei Wang
2018-07-27  9:24 ` Wei Wang
2018-07-27  9:24   ` [virtio-dev] " Wei Wang
2018-07-27  9:24 ` [PATCH v2 2/2] virtio_balloon: replace oom notifier with shrinker Wei Wang
2018-07-27  9:24   ` [virtio-dev] " Wei Wang
2018-07-30  9:00   ` Michal Hocko
2018-07-30  9:00     ` Michal Hocko
2018-08-01 11:12     ` Wei Wang
2018-08-01 11:12       ` [virtio-dev] " Wei Wang
2018-08-01 11:34       ` Michal Hocko
2018-08-01 11:34       ` Michal Hocko
2018-08-02 10:32         ` Wei Wang
2018-08-02 10:32           ` [virtio-dev] " Wei Wang
2018-08-02 11:00           ` Tetsuo Handa
2018-08-02 11:00           ` Tetsuo Handa
2018-08-02 11:27             ` Wei Wang
2018-08-02 11:27             ` Wei Wang
2018-08-02 11:27               ` [virtio-dev] " Wei Wang
2018-08-02 11:29               ` Michal Hocko
2018-08-02 11:29               ` Michal Hocko [this message]
2018-08-02 11:47           ` Michal Hocko
2018-08-03  5:35             ` Wei Wang
2018-08-03  5:35               ` [virtio-dev] " Wei Wang
2018-08-03  5:35               ` Wei Wang
2018-08-02 11:47           ` Michal Hocko
2018-08-02 15:18           ` Michael S. Tsirkin
2018-08-02 15:18             ` [virtio-dev] " Michael S. Tsirkin
2018-08-02 15:18           ` Michael S. Tsirkin
2018-08-02 10:32         ` Wei Wang
2018-08-01 11:12     ` Wei Wang
2018-07-27  9:24 ` Wei Wang
2018-07-27 14:06 ` [PATCH v2 0/2] virtio-balloon: some improvements Michael S. Tsirkin
2018-07-27 14:06 ` Michael S. Tsirkin
2018-07-27 14:06   ` [virtio-dev] " Michael S. Tsirkin
2018-07-28  2:00   ` Wang, Wei W
2018-07-28  2:00   ` Wang, Wei W
2018-07-28  2:00     ` [virtio-dev] " Wang, Wei W
2018-07-28  2:00     ` Wang, Wei W

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