From: "Li, Liang Z" <liang.z.li@intel.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"virtio-dev@lists.oasis-open.org"
<virtio-dev@lists.oasis-open.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"amit.shah@redhat.com" <amit.shah@redhat.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
"cornelia.huck@de.ibm.com" <cornelia.huck@de.ibm.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"david@redhat.com" <david@redhat.com>,
"aarcange@redhat.com" <aarcange@redhat.com>,
"dgilbert@redhat.com" <dgilbert@redhat.com>,
"quintela@redhat.com" <quintela@redhat.com>
Subject: RE: [PATCH v6 kernel 3/5] virtio-balloon: speed up inflate/deflate process
Date: Wed, 18 Jan 2017 04:56:58 +0000 [thread overview]
Message-ID: <F2CBF3009FA73547804AE4C663CAB28E3C355672@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <20170117211131-mutt-send-email-mst@kernel.org>
> > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL);
> > - virtqueue_kick(vq);
> > +static void do_set_resp_bitmap(struct virtio_balloon *vb,
> > + unsigned long base_pfn, int pages)
> >
> > - /* When host has read buffer, this completes via balloon_ack */
> > - wait_event(vb->acked, virtqueue_get_buf(vq, &len));
> > +{
> > + __le64 *range = vb->resp_data + vb->resp_pos;
> >
> > + if (pages > (1 << VIRTIO_BALLOON_NR_PFN_BITS)) {
> > + /* when the length field can't contain pages, set it to 0 to
>
> /*
> * Multi-line
> * comments
> * should look like this.
> */
>
> Also, pls start sentences with an upper-case letter.
>
Sorry for that.
> > + * indicate the actual length is in the next __le64;
> > + */
>
> This is part of the interface so should be documented as such.
>
> > + *range = cpu_to_le64((base_pfn <<
> > + VIRTIO_BALLOON_NR_PFN_BITS) | 0);
> > + *(range + 1) = cpu_to_le64(pages);
> > + vb->resp_pos += 2;
>
> Pls use structs for this kind of stuff.
I am not sure if you mean to use
struct range {
__le64 pfn: 52;
__le64 nr_page: 12
}
Instead of the shift operation?
I didn't use this way because I don't want to include 'virtio-balloon.h' in page_alloc.c,
or copy the define of this struct in page_alloc.c
Thanks!
Liang
next prev parent reply other threads:[~2017-01-18 5:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-21 6:52 [PATCH v6 kernel 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Liang Li
2016-12-21 6:52 ` [PATCH v6 kernel 1/5] virtio-balloon: rework deflate to add page to a list Liang Li
2016-12-21 6:52 ` [PATCH v6 kernel 2/5] virtio-balloon: define new feature bit and head struct Liang Li
2017-01-12 19:43 ` Michael S. Tsirkin
2017-01-13 9:24 ` [virtio-dev] " Li, Liang Z
2017-01-17 19:11 ` Michael S. Tsirkin
2017-01-18 1:55 ` Li, Liang Z
2017-01-18 15:30 ` Michael S. Tsirkin
2017-01-19 1:30 ` Li, Liang Z
2016-12-21 6:52 ` [PATCH v6 kernel 3/5] virtio-balloon: speed up inflate/deflate process Liang Li
2017-01-17 19:15 ` Michael S. Tsirkin
2017-01-18 4:56 ` Li, Liang Z [this message]
2017-01-18 15:30 ` Michael S. Tsirkin
2017-01-19 1:44 ` Li, Liang Z
2017-01-20 16:34 ` Michael S. Tsirkin
2017-01-20 11:48 ` Dr. David Alan Gilbert
2017-02-04 4:35 ` Li, Liang Z
2016-12-21 6:52 ` [PATCH v6 kernel 4/5] virtio-balloon: define flags and head for host request vq Liang Li
2016-12-21 6:52 ` [PATCH v6 kernel 5/5] virtio-balloon: tell host vm's unused page info Liang Li
2017-01-10 6:43 ` [PATCH v6 kernel 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Li, Liang Z
2017-01-18 10:09 ` David Hildenbrand
2017-01-18 13:29 ` Li, Liang Z
2017-01-18 15:38 ` Michael S. Tsirkin
2017-01-19 17:24 ` David Hildenbrand
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