From: "Michael S. Tsirkin" <mst@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Wei Wang <wei.w.wang@intel.com>,
virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org,
kvm@vger.kernel.org, linux-mm@kvack.org, david@redhat.com,
cornelia.huck@de.ibm.com, akpm@linux-foundation.org,
mgorman@techsingularity.net, aarcange@redhat.com,
amit.shah@redhat.com, pbonzini@redhat.com,
liliang.opensource@gmail.com,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS
Date: Tue, 13 Jun 2017 21:55:05 +0300 [thread overview]
Message-ID: <20170613215454-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <fb67359c-3d19-f67f-ec47-3cf868b8d9e8@intel.com>
On Tue, Jun 13, 2017 at 10:59:07AM -0700, Dave Hansen wrote:
> On 06/13/2017 10:56 AM, Michael S. Tsirkin wrote:
> >> +/* The size of one page_bmap used to record inflated/deflated pages. */
> >> +#define VIRTIO_BALLOON_PAGE_BMAP_SIZE (8 * PAGE_SIZE)
> > At this size, you probably want alloc_pages to avoid kmalloc
> > overhead.
>
> For slub, at least, kmalloc() just calls alloc_pages() basically
> directly. There's virtually no overhead.
>
>
OK then.
--
MST
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WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Wei Wang <wei.w.wang@intel.com>,
virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org,
kvm@vger.kernel.org, linux-mm@kvack.org, david@redhat.com,
cornelia.huck@de.ibm.com, akpm@linux-foundation.org,
mgorman@techsingularity.net, aarcange@redhat.com,
amit.shah@redhat.com, pbonzini@redhat.com,
liliang.opensource@gmail.com,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS
Date: Tue, 13 Jun 2017 21:55:05 +0300 [thread overview]
Message-ID: <20170613215454-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <fb67359c-3d19-f67f-ec47-3cf868b8d9e8@intel.com>
On Tue, Jun 13, 2017 at 10:59:07AM -0700, Dave Hansen wrote:
> On 06/13/2017 10:56 AM, Michael S. Tsirkin wrote:
> >> +/* The size of one page_bmap used to record inflated/deflated pages. */
> >> +#define VIRTIO_BALLOON_PAGE_BMAP_SIZE (8 * PAGE_SIZE)
> > At this size, you probably want alloc_pages to avoid kmalloc
> > overhead.
>
> For slub, at least, kmalloc() just calls alloc_pages() basically
> directly. There's virtually no overhead.
>
>
OK then.
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Wei Wang <wei.w.wang@intel.com>,
virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org,
kvm@vger.kernel.org, linux-mm@kvack.org, david@redhat.com,
cornelia.huck@de.ibm.com, akpm@linux-foundation.org,
mgorman@techsingularity.net, aarcange@redhat.com,
amit.shah@redhat.com, pbonzini@redhat.com,
liliang.opensource@gmail.com,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [Qemu-devel] [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS
Date: Tue, 13 Jun 2017 21:55:05 +0300 [thread overview]
Message-ID: <20170613215454-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <fb67359c-3d19-f67f-ec47-3cf868b8d9e8@intel.com>
On Tue, Jun 13, 2017 at 10:59:07AM -0700, Dave Hansen wrote:
> On 06/13/2017 10:56 AM, Michael S. Tsirkin wrote:
> >> +/* The size of one page_bmap used to record inflated/deflated pages. */
> >> +#define VIRTIO_BALLOON_PAGE_BMAP_SIZE (8 * PAGE_SIZE)
> > At this size, you probably want alloc_pages to avoid kmalloc
> > overhead.
>
> For slub, at least, kmalloc() just calls alloc_pages() basically
> directly. There's virtually no overhead.
>
>
OK then.
--
MST
next prev parent reply other threads:[~2017-06-13 18:55 UTC|newest]
Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 10:41 [PATCH v11 0/6] Virtio-balloon Enhancement Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [PATCH v11 1/6] virtio-balloon: deflate via a page list Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [PATCH v11 2/6] virtio-balloon: coding format cleanup Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [PATCH v11 3/6] virtio-balloon: VIRTIO_BALLOON_F_PAGE_CHUNKS Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-13 17:56 ` Michael S. Tsirkin
2017-06-13 17:56 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-13 17:56 ` Michael S. Tsirkin
2017-06-13 17:59 ` Dave Hansen
2017-06-13 17:59 ` [Qemu-devel] " Dave Hansen
2017-06-13 17:59 ` Dave Hansen
2017-06-13 18:55 ` Michael S. Tsirkin [this message]
2017-06-13 18:55 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-13 18:55 ` Michael S. Tsirkin
2017-06-13 18:55 ` Michael S. Tsirkin
2017-06-13 17:59 ` Dave Hansen
2017-06-15 8:10 ` [virtio-dev] " Wei Wang
2017-06-15 8:10 ` Wei Wang
2017-06-15 8:10 ` [Qemu-devel] " Wei Wang
2017-06-15 8:10 ` Wei Wang
2017-06-16 3:19 ` Michael S. Tsirkin
2017-06-16 3:19 ` [Qemu-devel] [virtio-dev] " Michael S. Tsirkin
2017-06-16 3:19 ` Michael S. Tsirkin
2017-06-16 3:19 ` Michael S. Tsirkin
2017-06-16 3:19 ` Michael S. Tsirkin
2017-06-28 15:04 ` Matthew Wilcox
2017-06-28 15:04 ` [Qemu-devel] " Matthew Wilcox
2017-06-28 15:04 ` Matthew Wilcox
2017-06-28 15:04 ` Matthew Wilcox
2017-07-12 13:05 ` Wei Wang
2017-07-12 13:05 ` Wei Wang
2017-07-12 13:05 ` [Qemu-devel] " Wei Wang
2017-07-12 13:05 ` Wei Wang
2017-07-12 13:05 ` Wei Wang
2017-07-12 13:05 ` Wei Wang
2017-06-13 17:56 ` Michael S. Tsirkin
2017-06-09 10:41 ` [PATCH v11 4/6] mm: function to offer a page block on the free list Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-12 14:10 ` Dave Hansen
2017-06-12 14:10 ` [Qemu-devel] " Dave Hansen
2017-06-12 14:10 ` Dave Hansen
2017-06-12 16:28 ` Michael S. Tsirkin
2017-06-12 16:28 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-12 16:28 ` Michael S. Tsirkin
2017-06-12 16:42 ` Dave Hansen
2017-06-12 16:42 ` [Qemu-devel] " Dave Hansen
2017-06-12 16:42 ` Dave Hansen
2017-06-12 20:34 ` Michael S. Tsirkin
2017-06-12 20:34 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-12 20:34 ` Michael S. Tsirkin
2017-06-12 20:34 ` Michael S. Tsirkin
2017-06-12 20:54 ` Dave Hansen
2017-06-12 20:54 ` [Qemu-devel] " Dave Hansen
2017-06-12 20:54 ` Dave Hansen
2017-06-13 2:56 ` Wei Wang
2017-06-13 2:56 ` [Qemu-devel] " Wei Wang
2017-06-13 2:56 ` Wei Wang
2017-06-13 2:56 ` Wei Wang
2017-06-12 20:54 ` Dave Hansen
2017-06-12 16:42 ` Dave Hansen
2017-06-12 16:28 ` Michael S. Tsirkin
2017-06-20 16:44 ` Rik van Riel
2017-06-20 16:44 ` [Qemu-devel] " Rik van Riel
2017-06-20 16:49 ` David Hildenbrand
2017-06-20 16:49 ` [Qemu-devel] " David Hildenbrand
2017-06-20 16:49 ` David Hildenbrand
2017-06-20 17:29 ` Rik van Riel
2017-06-20 17:29 ` [Qemu-devel] " Rik van Riel
2017-06-20 18:26 ` Michael S. Tsirkin
2017-06-20 18:26 ` Michael S. Tsirkin
2017-06-20 18:26 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-20 18:26 ` Michael S. Tsirkin
2017-06-20 19:51 ` Rik van Riel
2017-06-20 19:51 ` Rik van Riel
2017-06-20 19:51 ` [Qemu-devel] " Rik van Riel
2017-06-21 12:41 ` Michael S. Tsirkin
2017-06-21 12:41 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-21 12:41 ` Michael S. Tsirkin
2017-06-21 12:41 ` Michael S. Tsirkin
2017-06-21 12:41 ` Michael S. Tsirkin
2017-06-21 8:38 ` [Qemu-devel] " Wei Wang
2017-06-21 8:38 ` Wei Wang
2017-06-21 8:38 ` Wei Wang
2017-06-20 17:29 ` Rik van Riel
2017-06-20 18:17 ` Michael S. Tsirkin
2017-06-20 18:17 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-20 18:17 ` Michael S. Tsirkin
2017-06-20 18:54 ` David Hildenbrand
2017-06-20 18:54 ` [Qemu-devel] " David Hildenbrand
2017-06-20 18:54 ` David Hildenbrand
2017-06-20 18:56 ` Michael S. Tsirkin
2017-06-20 18:56 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-20 18:56 ` Michael S. Tsirkin
2017-06-20 19:01 ` David Hildenbrand
2017-06-20 19:01 ` [Qemu-devel] " David Hildenbrand
2017-06-20 19:01 ` David Hildenbrand
2017-06-20 19:01 ` David Hildenbrand
2017-06-20 18:56 ` Michael S. Tsirkin
2017-06-20 18:54 ` David Hildenbrand
2017-06-20 18:17 ` Michael S. Tsirkin
2017-06-21 12:56 ` Christian Borntraeger
2017-06-21 12:56 ` [Qemu-devel] " Christian Borntraeger
2017-06-21 12:56 ` Christian Borntraeger
2017-06-21 13:47 ` David Hildenbrand
2017-06-21 13:47 ` David Hildenbrand
2017-06-21 13:47 ` [Qemu-devel] " David Hildenbrand
2017-06-21 13:47 ` David Hildenbrand
2017-06-20 16:49 ` David Hildenbrand
2017-06-20 16:44 ` Rik van Riel
2017-06-12 14:10 ` Dave Hansen
2017-06-09 10:41 ` [PATCH v11 5/6] mm: export symbol of next_zone and first_online_pgdat Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [PATCH v11 6/6] virtio-balloon: VIRTIO_BALLOON_F_CMD_VQ Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-09 10:41 ` [Qemu-devel] " Wei Wang
2017-06-09 10:41 ` Wei Wang
2017-06-12 14:07 ` Dave Hansen
2017-06-12 14:07 ` Dave Hansen
2017-06-12 14:07 ` [Qemu-devel] " Dave Hansen
2017-06-12 14:07 ` Dave Hansen
2017-06-13 10:17 ` Wei Wang
2017-06-13 10:17 ` [Qemu-devel] " Wei Wang
2017-06-13 10:17 ` Wei Wang
2017-06-13 10:17 ` Wei Wang
2017-06-20 16:18 ` Michael S. Tsirkin
2017-06-20 16:18 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-20 16:18 ` Michael S. Tsirkin
2017-06-21 3:28 ` Wei Wang
2017-06-21 3:28 ` [Qemu-devel] [virtio-dev] " Wei Wang
2017-06-21 3:28 ` Wei Wang
2017-06-21 3:28 ` Wei Wang
2017-06-21 12:28 ` Michael S. Tsirkin
2017-06-21 12:28 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-21 12:28 ` Michael S. Tsirkin
2017-06-21 12:28 ` Michael S. Tsirkin
2017-06-22 8:40 ` Wei Wang
2017-06-22 8:40 ` [Qemu-devel] " Wei Wang
2017-06-22 8:40 ` Wei Wang
2017-06-22 8:40 ` Wei Wang
2017-06-28 15:01 ` Michael S. Tsirkin
2017-06-28 15:01 ` Michael S. Tsirkin
2017-06-28 15:01 ` [Qemu-devel] " Michael S. Tsirkin
2017-06-28 15:01 ` Michael S. Tsirkin
2017-06-28 15:01 ` Michael S. Tsirkin
2017-07-12 12:57 ` Wei Wang
2017-07-12 12:57 ` Wei Wang
2017-07-12 12:57 ` [Qemu-devel] " Wei Wang
2017-07-12 12:57 ` Wei Wang
2017-07-12 12:57 ` Wei Wang
2017-07-12 12:57 ` Wei Wang
2017-06-22 8:40 ` [virtio-dev] " Wei Wang
2017-06-21 3:28 ` Wei Wang
2017-06-20 16:18 ` Michael S. Tsirkin
2017-06-09 11:18 ` [PATCH v11 0/6] Virtio-balloon Enhancement Wang, Wei W
2017-06-09 11:18 ` Wang, Wei W
2017-06-09 11:18 ` [Qemu-devel] " Wang, Wei W
2017-06-09 11:18 ` Wang, Wei W
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