From: "Wang, Wei W" <wei.w.wang@intel.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: "aarcange@redhat.com" <aarcange@redhat.com>,
"virtio-dev@lists.oasis-open.org"
<virtio-dev@lists.oasis-open.org>,
"amit.shah@redhat.com" <amit.shah@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"liliang.opensource@gmail.com" <liliang.opensource@gmail.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"yang.zhang.wz@gmail.com" <yang.zhang.wz@gmail.com>,
"quan.xu@aliyun.com" <quan.xu@aliyun.com>,
"cornelia.huck@de.ibm.com" <cornelia.huck@de.ibm.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"mgorman@techsingularity.net" <mgorman@techsingularity.net>
Subject: RE: [PATCH v12 6/8] mm: support reporting free page blocks
Date: Wed, 26 Jul 2017 12:47:47 +0000 [thread overview]
Message-ID: <286AC319A985734F985F78AFA26841F739285191__28463.0836839371$1501073294$gmane$org@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <20170726115506.GM2981@dhcp22.suse.cz>
On Wednesday, July 26, 2017 7:55 PM, Michal Hocko wrote:
> On Wed 26-07-17 19:44:23, Wei Wang wrote:
> [...]
> > I thought about it more. Probably we can use the callback function
> > with a little change like this:
> >
> > void walk_free_mem(void *opaque1, void (*visit)(void *opaque2,
> > unsigned long pfn,
> > unsigned long nr_pages))
> > {
> > ...
> > for_each_populated_zone(zone) {
> > for_each_migratetype_order(order, type) {
> > report_unused_page_block(zone, order, type,
> > &page); // from patch 6
> > pfn = page_to_pfn(page);
> > visit(opaque1, pfn, 1 << order);
> > }
> > }
> > }
> >
> > The above function scans all the free list and directly sends each
> > free page block to the hypervisor via the virtio_balloon callback
> > below. No need to implement a bitmap.
> >
> > In virtio-balloon, we have the callback:
> > void *virtio_balloon_report_unused_pages(void *opaque, unsigned long
> > pfn, unsigned long nr_pages) {
> > struct virtio_balloon *vb = (struct virtio_balloon *)opaque;
> > ...put the free page block to the the ring of vb; }
> >
> >
> > What do you think?
>
> I do not mind conveying a context to the callback. I would still prefer
> to keep the original min_order to check semantic though. Why? Well,
> it doesn't make much sense to scan low order free blocks all the time
> because they are simply too volatile. Larger blocks tend to surivive for
> longer. So I assume you would only care about larger free blocks. This
> will also make the call cheaper.
> --
OK, I will keep min order there in the next version.
Best,
Wei
next prev parent reply other threads:[~2017-07-26 12:47 UTC|newest]
Thread overview: 290+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-12 12:40 [PATCH v12 0/8] Virtio-balloon Enhancement Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 1/8] virtio-balloon: deflate via a page list Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 2/8] virtio-balloon: coding format cleanup Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 3/8] Introduce xbitmap Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 4/8] xbitmap: add xb_find_next_bit() and xb_zero() Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 5/8] virtio-balloon: VIRTIO_BALLOON_F_SG Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 13:06 ` Michael S. Tsirkin
2017-07-12 13:06 ` [virtio-dev] " Michael S. Tsirkin
2017-07-12 13:06 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-12 13:06 ` Michael S. Tsirkin
2017-07-12 13:29 ` Wei Wang
2017-07-12 13:29 ` Wei Wang
2017-07-12 13:29 ` [virtio-dev] " Wei Wang
2017-07-12 13:29 ` [Qemu-devel] " Wei Wang
2017-07-12 13:29 ` Wei Wang
2017-07-12 13:56 ` Michael S. Tsirkin
2017-07-12 13:56 ` [virtio-dev] " Michael S. Tsirkin
2017-07-12 13:56 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-12 13:56 ` Michael S. Tsirkin
2017-07-13 7:42 ` Wei Wang
2017-07-13 7:42 ` [virtio-dev] " Wei Wang
2017-07-13 7:42 ` [Qemu-devel] " Wei Wang
2017-07-13 7:42 ` Wei Wang
2017-07-13 20:19 ` Michael S. Tsirkin
2017-07-13 20:19 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 20:19 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 20:19 ` Michael S. Tsirkin
2017-07-14 7:12 ` Wei Wang
2017-07-14 7:12 ` Wei Wang
2017-07-14 7:12 ` [virtio-dev] " Wei Wang
2017-07-14 7:12 ` [Qemu-devel] " Wei Wang
2017-07-14 7:12 ` Wei Wang
2017-07-23 1:45 ` Michael S. Tsirkin
2017-07-23 1:45 ` [virtio-dev] " Michael S. Tsirkin
2017-07-23 1:45 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-23 1:45 ` Michael S. Tsirkin
2017-07-26 3:48 ` Wei Wang
2017-07-26 3:48 ` Wei Wang
2017-07-26 3:48 ` [virtio-dev] " Wei Wang
2017-07-26 3:48 ` [Qemu-devel] " Wei Wang
2017-07-26 3:48 ` Wei Wang
2017-07-26 17:02 ` Michael S. Tsirkin
2017-07-26 17:02 ` Michael S. Tsirkin
2017-07-26 17:02 ` [virtio-dev] " Michael S. Tsirkin
2017-07-26 17:02 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-26 17:02 ` Michael S. Tsirkin
2017-07-27 2:50 ` Wei Wang
2017-07-27 2:50 ` Wei Wang
2017-07-27 2:50 ` [virtio-dev] " Wei Wang
2017-07-27 2:50 ` [Qemu-devel] " Wei Wang
2017-07-27 2:50 ` Wei Wang
2017-07-28 23:08 ` Michael S. Tsirkin
2017-07-28 23:08 ` [virtio-dev] " Michael S. Tsirkin
2017-07-28 23:08 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-28 23:08 ` Michael S. Tsirkin
2017-07-29 12:47 ` Wei Wang
2017-07-29 12:47 ` [virtio-dev] " Wei Wang
2017-07-29 12:47 ` [Qemu-devel] " Wei Wang
2017-07-29 12:47 ` Wei Wang
2017-07-29 12:47 ` Wei Wang
2017-07-30 4:22 ` Michael S. Tsirkin
2017-07-30 4:22 ` Michael S. Tsirkin
2017-07-30 4:22 ` [virtio-dev] " Michael S. Tsirkin
2017-07-30 4:22 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-30 4:22 ` Michael S. Tsirkin
2017-07-30 5:59 ` Wang, Wei W
2017-07-30 5:59 ` [Qemu-devel] " Wang, Wei W
2017-07-30 5:59 ` Wang, Wei W
2017-07-30 16:18 ` Michael S. Tsirkin
2017-07-30 16:18 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-30 16:18 ` Michael S. Tsirkin
2017-07-30 16:18 ` Michael S. Tsirkin
2017-07-30 16:20 ` Michael S. Tsirkin
2017-07-30 16:20 ` Michael S. Tsirkin
2017-07-30 16:20 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-30 16:20 ` Michael S. Tsirkin
2017-07-30 16:20 ` Michael S. Tsirkin
2017-07-31 12:36 ` Wei Wang
2017-07-31 12:36 ` Wei Wang
2017-07-31 12:36 ` [virtio-dev] " Wei Wang
2017-07-31 12:36 ` [Qemu-devel] " Wei Wang
2017-07-31 12:36 ` Wei Wang
2017-07-30 16:18 ` Michael S. Tsirkin
2017-07-30 5:59 ` Wang, Wei W
2017-07-28 23:08 ` Michael S. Tsirkin
2017-07-23 1:45 ` Michael S. Tsirkin
2017-07-13 20:19 ` Michael S. Tsirkin
2017-07-13 7:42 ` Wei Wang
2017-07-12 13:56 ` Michael S. Tsirkin
2017-07-12 13:06 ` Michael S. Tsirkin
2017-07-13 0:44 ` Michael S. Tsirkin
2017-07-13 0:44 ` Michael S. Tsirkin
2017-07-13 0:44 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 0:44 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 0:44 ` Michael S. Tsirkin
2017-07-13 1:16 ` kbuild test robot
2017-07-13 1:16 ` [Qemu-devel] " kbuild test robot
2017-07-13 1:16 ` kbuild test robot
2017-07-13 1:16 ` kbuild test robot
2017-07-13 4:21 ` kbuild test robot
2017-07-13 4:21 ` [Qemu-devel] " kbuild test robot
2017-07-13 4:21 ` kbuild test robot
2017-07-13 4:21 ` kbuild test robot
2017-07-28 8:25 ` Wei Wang
2017-07-28 8:25 ` [virtio-dev] " Wei Wang
2017-07-28 8:25 ` [Qemu-devel] " Wei Wang
2017-07-28 8:25 ` Wei Wang
2017-07-28 23:01 ` Michael S. Tsirkin
2017-07-28 23:01 ` Michael S. Tsirkin
2017-07-28 23:01 ` [virtio-dev] " Michael S. Tsirkin
2017-07-28 23:01 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-28 23:01 ` Michael S. Tsirkin
2017-07-28 8:25 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 6/8] mm: support reporting free page blocks Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-13 0:33 ` Michael S. Tsirkin
2017-07-13 0:33 ` Michael S. Tsirkin
2017-07-13 0:33 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 0:33 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 0:33 ` Michael S. Tsirkin
2017-07-13 8:25 ` Wei Wang
2017-07-13 8:25 ` [virtio-dev] " Wei Wang
2017-07-13 8:25 ` [Qemu-devel] " Wei Wang
2017-07-13 8:25 ` Wei Wang
2017-07-13 8:25 ` Wei Wang
2017-07-14 12:30 ` Michal Hocko
2017-07-14 12:30 ` [Qemu-devel] " Michal Hocko
2017-07-14 12:30 ` Michal Hocko
2017-07-14 12:54 ` Michal Hocko
2017-07-14 12:54 ` [Qemu-devel] " Michal Hocko
2017-07-14 12:54 ` Michal Hocko
2017-07-14 15:46 ` Michael S. Tsirkin
2017-07-14 15:46 ` Michael S. Tsirkin
2017-07-14 15:46 ` [virtio-dev] " Michael S. Tsirkin
2017-07-14 15:46 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-14 15:46 ` Michael S. Tsirkin
2017-07-14 12:54 ` Michal Hocko
2017-07-14 19:17 ` Michael S. Tsirkin
2017-07-14 19:17 ` [virtio-dev] " Michael S. Tsirkin
2017-07-14 19:17 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-14 19:17 ` Michael S. Tsirkin
2017-07-17 15:24 ` Michal Hocko
2017-07-17 15:24 ` Michal Hocko
2017-07-17 15:24 ` [Qemu-devel] " Michal Hocko
2017-07-17 15:24 ` Michal Hocko
2017-07-18 2:12 ` Wei Wang
2017-07-18 2:12 ` [virtio-dev] " Wei Wang
2017-07-18 2:12 ` [Qemu-devel] " Wei Wang
2017-07-18 2:12 ` Wei Wang
2017-07-18 2:12 ` Wei Wang
2017-07-19 8:13 ` Michal Hocko
2017-07-19 8:13 ` [Qemu-devel] " Michal Hocko
2017-07-19 8:13 ` Michal Hocko
2017-07-19 12:01 ` Wei Wang
2017-07-19 12:01 ` Wei Wang
2017-07-19 12:01 ` [virtio-dev] " Wei Wang
2017-07-19 12:01 ` [Qemu-devel] " Wei Wang
2017-07-19 12:01 ` Wei Wang
2017-07-24 9:00 ` Michal Hocko
2017-07-24 9:00 ` [Qemu-devel] " Michal Hocko
2017-07-24 9:00 ` Michal Hocko
2017-07-25 9:32 ` Wei Wang
2017-07-25 9:32 ` Wei Wang
2017-07-25 9:32 ` [virtio-dev] " Wei Wang
2017-07-25 9:32 ` [Qemu-devel] " Wei Wang
2017-07-25 9:32 ` Wei Wang
2017-07-25 11:25 ` Michal Hocko
2017-07-25 11:25 ` Michal Hocko
2017-07-25 11:25 ` [Qemu-devel] " Michal Hocko
2017-07-25 11:25 ` Michal Hocko
2017-07-25 11:56 ` Wei Wang
2017-07-25 11:56 ` [virtio-dev] " Wei Wang
2017-07-25 11:56 ` [Qemu-devel] " Wei Wang
2017-07-25 11:56 ` Wei Wang
2017-07-25 12:41 ` Michal Hocko
2017-07-25 12:41 ` [Qemu-devel] " Michal Hocko
2017-07-25 12:41 ` Michal Hocko
2017-07-25 12:41 ` Michal Hocko
2017-07-25 14:47 ` Wang, Wei W
2017-07-25 14:47 ` Wang, Wei W
2017-07-25 14:47 ` [virtio-dev] " Wang, Wei W
2017-07-25 14:47 ` [Qemu-devel] " Wang, Wei W
2017-07-25 14:47 ` Wang, Wei W
2017-07-25 14:47 ` Wang, Wei W
2017-07-25 14:53 ` Michal Hocko
2017-07-25 14:53 ` [Qemu-devel] " Michal Hocko
2017-07-25 14:53 ` Michal Hocko
2017-07-25 14:53 ` Michal Hocko
2017-07-26 2:22 ` Wei Wang
2017-07-26 2:22 ` Wei Wang
2017-07-26 2:22 ` [virtio-dev] " Wei Wang
2017-07-26 2:22 ` [Qemu-devel] " Wei Wang
2017-07-26 2:22 ` Wei Wang
2017-07-26 2:22 ` Wei Wang
2017-07-26 10:24 ` Michal Hocko
2017-07-26 10:24 ` [Qemu-devel] " Michal Hocko
2017-07-26 10:24 ` Michal Hocko
2017-07-26 10:24 ` Michal Hocko
2017-07-26 11:44 ` Wei Wang
2017-07-26 11:44 ` [virtio-dev] " Wei Wang
2017-07-26 11:44 ` [Qemu-devel] " Wei Wang
2017-07-26 11:44 ` Wei Wang
2017-07-26 11:44 ` Wei Wang
2017-07-26 11:55 ` Michal Hocko
2017-07-26 11:55 ` Michal Hocko
2017-07-26 11:55 ` [Qemu-devel] " Michal Hocko
2017-07-26 11:55 ` Michal Hocko
2017-07-26 11:55 ` Michal Hocko
2017-07-26 12:47 ` Wang, Wei W [this message]
2017-07-26 12:47 ` Wang, Wei W
2017-07-26 12:47 ` [virtio-dev] " Wang, Wei W
2017-07-26 12:47 ` [Qemu-devel] " Wang, Wei W
2017-07-26 12:47 ` Wang, Wei W
2017-07-26 12:47 ` Wang, Wei W
2017-07-26 10:24 ` Michal Hocko
2017-07-25 11:56 ` Wei Wang
2017-07-24 9:00 ` Michal Hocko
2017-07-19 8:13 ` Michal Hocko
2017-07-14 19:17 ` Michael S. Tsirkin
2017-07-14 12:30 ` Michal Hocko
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [PATCH v12 7/8] mm: export symbol of next_zone and first_online_pgdat Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-13 0:16 ` Michael S. Tsirkin
2017-07-13 0:16 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 0:16 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 0:16 ` Michael S. Tsirkin
2017-07-13 8:41 ` [virtio-dev] " Wei Wang
2017-07-13 8:41 ` Wei Wang
2017-07-13 8:41 ` [Qemu-devel] " Wei Wang
2017-07-13 8:41 ` Wei Wang
2017-07-13 8:41 ` Wei Wang
2017-07-13 0:16 ` Michael S. Tsirkin
2017-07-14 12:31 ` Michal Hocko
2017-07-14 12:31 ` Michal Hocko
2017-07-14 12:31 ` [Qemu-devel] " Michal Hocko
2017-07-14 12:31 ` Michal Hocko
2017-07-12 12:40 ` [PATCH v12 8/8] virtio-balloon: VIRTIO_BALLOON_F_CMD_VQ Wei Wang
2017-07-12 12:40 ` [virtio-dev] " Wei Wang
2017-07-12 12:40 ` [Qemu-devel] " Wei Wang
2017-07-12 12:40 ` Wei Wang
2017-07-13 0:22 ` Michael S. Tsirkin
2017-07-13 0:22 ` Michael S. Tsirkin
2017-07-13 0:22 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 0:22 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 0:22 ` Michael S. Tsirkin
2017-07-13 8:46 ` Wei Wang
2017-07-13 8:46 ` Wei Wang
2017-07-13 8:46 ` [virtio-dev] " Wei Wang
2017-07-13 8:46 ` [Qemu-devel] " Wei Wang
2017-07-13 8:46 ` Wei Wang
2017-07-13 17:59 ` Michael S. Tsirkin
2017-07-13 17:59 ` Michael S. Tsirkin
2017-07-13 17:59 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 17:59 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 17:59 ` Michael S. Tsirkin
2017-07-12 12:40 ` Wei Wang
2017-07-13 0:14 ` [PATCH v12 0/8] Virtio-balloon Enhancement Michael S. Tsirkin
2017-07-13 0:14 ` Michael S. Tsirkin
2017-07-13 0:14 ` [virtio-dev] " Michael S. Tsirkin
2017-07-13 0:14 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-13 0:14 ` Michael S. Tsirkin
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