From: "Michael S. Tsirkin" <mst@redhat.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Wei Wang <wei.w.wang@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
virtio-dev@lists.oasis-open.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
virtualization <virtualization@lists.linux-foundation.org>,
KVM list <kvm@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Paolo Bonzini <pbonzini@redhat.com>,
liliang.opensource@gmail.com, yang.zhang.wz@gmail.com,
quan.xu0@gmail.com, nilal@redhat.com,
Rik van Riel <riel@redhat.com>,
peterx@redhat.com
Subject: [virtio-dev] Re: [PATCH v35 1/5] mm: support to get hints of free page blocks
Date: Wed, 11 Jul 2018 22:36:50 +0300 [thread overview]
Message-ID: <20180711223040-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20180711110949.GJ20050@dhcp22.suse.cz>
On Wed, Jul 11, 2018 at 01:09:49PM +0200, Michal Hocko wrote:
> But let me note that I am not really convinced how this (or previous)
> approach will really work in most workloads. We tend to cache heavily so
> there is rarely any memory free.
It might be that it's worth flushing the cache when VM is
migrating. Or maybe we should implement virtio-tmem or add
transcendent memory support to the balloon.
--
MST
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WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Wei Wang <wei.w.wang@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
virtio-dev@lists.oasis-open.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
virtualization <virtualization@lists.linux-foundation.org>,
KVM list <kvm@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Paolo Bonzini <pbonzini@redhat.com>,
liliang.opensource@gmail.com, yang.zhang.wz@gmail.com,
quan.xu0@gmail.com, nilal@redhat.com,
Rik van Riel <riel@redhat.com>,
peterx@redhat.com
Subject: Re: [PATCH v35 1/5] mm: support to get hints of free page blocks
Date: Wed, 11 Jul 2018 22:36:50 +0300 [thread overview]
Message-ID: <20180711223040-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20180711110949.GJ20050@dhcp22.suse.cz>
On Wed, Jul 11, 2018 at 01:09:49PM +0200, Michal Hocko wrote:
> But let me note that I am not really convinced how this (or previous)
> approach will really work in most workloads. We tend to cache heavily so
> there is rarely any memory free.
It might be that it's worth flushing the cache when VM is
migrating. Or maybe we should implement virtio-tmem or add
transcendent memory support to the balloon.
--
MST
next prev parent reply other threads:[~2018-07-11 19:36 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-10 9:31 [virtio-dev] [PATCH v35 0/5] Virtio-balloon: support free page reporting Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 9:31 ` [PATCH v35 1/5] mm: support to get hints of free page blocks Wei Wang
2018-07-10 9:31 ` [virtio-dev] " Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 10:16 ` [virtio-dev] " Wang, Wei W
2018-07-10 10:16 ` Wang, Wei W
2018-07-10 10:16 ` Wang, Wei W
2018-07-10 17:33 ` Linus Torvalds
2018-07-10 17:33 ` Linus Torvalds
2018-07-11 1:28 ` Wei Wang
2018-07-11 1:28 ` [virtio-dev] " Wei Wang
2018-07-11 1:28 ` Wei Wang
2018-07-11 1:44 ` Linus Torvalds
2018-07-11 9:21 ` Michal Hocko
2018-07-11 9:21 ` Michal Hocko
2018-07-11 10:52 ` [virtio-dev] " Wei Wang
2018-07-11 10:52 ` Wei Wang
2018-07-11 10:52 ` Wei Wang
2018-07-11 11:09 ` Michal Hocko
2018-07-11 11:09 ` Michal Hocko
2018-07-11 13:55 ` [virtio-dev] " Wang, Wei W
2018-07-11 13:55 ` Wang, Wei W
2018-07-11 14:38 ` Michal Hocko
2018-07-11 14:38 ` Michal Hocko
2018-07-11 13:55 ` Wang, Wei W
2018-07-11 19:36 ` Michael S. Tsirkin [this message]
2018-07-11 19:36 ` Michael S. Tsirkin
2018-07-11 19:36 ` Michael S. Tsirkin
2018-07-11 16:23 ` Linus Torvalds
2018-07-12 2:21 ` [virtio-dev] " Wei Wang
2018-07-12 2:21 ` Wei Wang
2018-07-12 2:30 ` Linus Torvalds
2018-07-12 2:30 ` Linus Torvalds
2018-07-12 2:52 ` [virtio-dev] " Wei Wang
2018-07-12 2:52 ` Wei Wang
2018-07-12 2:52 ` Wei Wang
2018-07-12 8:13 ` Michal Hocko
2018-07-12 11:34 ` [virtio-dev] " Wei Wang
2018-07-12 11:34 ` Wei Wang
2018-07-12 11:49 ` Michal Hocko
2018-07-12 11:49 ` Michal Hocko
2018-07-13 0:33 ` [virtio-dev] " Wei Wang
2018-07-13 0:33 ` Wei Wang
2018-07-13 0:33 ` Wei Wang
2018-07-12 11:34 ` Wei Wang
2018-07-12 8:13 ` Michal Hocko
2018-07-12 2:21 ` Wei Wang
2018-07-12 13:12 ` Michal Hocko
2018-07-12 13:12 ` Michal Hocko
2018-07-11 16:23 ` Linus Torvalds
2018-07-11 1:44 ` Linus Torvalds
2018-07-11 4:00 ` [virtio-dev] " Michael S. Tsirkin
2018-07-11 4:00 ` Michael S. Tsirkin
2018-07-11 4:04 ` [virtio-dev] " Michael S. Tsirkin
2018-07-11 4:04 ` Michael S. Tsirkin
2018-07-11 4:04 ` Michael S. Tsirkin
2018-07-11 4:00 ` Michael S. Tsirkin
2018-07-10 9:31 ` [PATCH v35 2/5] virtio-balloon: remove BUG() in init_vqs Wei Wang
2018-07-10 9:31 ` [virtio-dev] " Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 9:31 ` [PATCH v35 3/5] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT Wei Wang
2018-07-10 9:31 ` [virtio-dev] " Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 9:31 ` [PATCH v35 4/5] mm/page_poison: expose page_poisoning_enabled to kernel modules Wei Wang
2018-07-10 9:31 ` [virtio-dev] " Wei Wang
2018-07-10 9:31 ` Wei Wang
2018-07-10 9:31 ` [PATCH v35 5/5] virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON Wei Wang
2018-07-10 9:31 ` [virtio-dev] " Wei Wang
2018-07-10 9:31 ` Wei Wang
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