From: Liang Li <liang.z.li@intel.com> To: mst@redhat.com Cc: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, dgilbert@redhat.com, quintela@redhat.com, Liang Li <liang.z.li@intel.com>, Paolo Bonzini <pbonzini@redhat.com>, Cornelia Huck <cornelia.huck@de.ibm.com>, Amit Shah <amit.shah@redhat.com> Subject: [PATCH v2 kernel 2/7] virtio-balloon: define new feature bit and page bitmap head Date: Wed, 29 Jun 2016 18:32:15 +0800 [thread overview] Message-ID: <1467196340-22079-3-git-send-email-liang.z.li@intel.com> (raw) In-Reply-To: <1467196340-22079-1-git-send-email-liang.z.li@intel.com> Add a new feature which supports sending the page information with a bitmap. The current implementation uses PFNs array, which is not very efficient. Using bitmap can improve the performance of inflating/deflating significantly The page bitmap header will used to tell the host some information about the page bitmap. e.g. the page size, page bitmap length and start pfn. Signed-off-by: Liang Li <liang.z.li@intel.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Amit Shah <amit.shah@redhat.com> --- include/uapi/linux/virtio_balloon.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index 343d7dd..d3b182a 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -34,6 +34,7 @@ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */ #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */ +#define VIRTIO_BALLOON_F_PAGE_BITMAP 3 /* Send page info with bitmap */ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 @@ -82,4 +83,22 @@ struct virtio_balloon_stat { __virtio64 val; } __attribute__((packed)); +/* Page bitmap header structure */ +struct balloon_bmap_hdr { + /* Used to distinguish different request */ + __virtio16 cmd; + /* Shift width of page in the bitmap */ + __virtio16 page_shift; + /* flag used to identify different status */ + __virtio16 flag; + /* Reserved */ + __virtio16 reserved; + /* ID of the request */ + __virtio64 req_id; + /* The pfn of 0 bit in the bitmap */ + __virtio64 start_pfn; + /* The length of the bitmap, in bytes */ + __virtio64 bmap_len; +}; + #endif /* _LINUX_VIRTIO_BALLOON_H */ -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Liang Li <liang.z.li@intel.com> To: mst@redhat.com Cc: linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, dgilbert@redhat.com, quintela@redhat.com, Liang Li <liang.z.li@intel.com>, Paolo Bonzini <pbonzini@redhat.com>, Cornelia Huck <cornelia.huck@de.ibm.com>, Amit Shah <amit.shah@redhat.com> Subject: [Qemu-devel] [PATCH v2 kernel 2/7] virtio-balloon: define new feature bit and page bitmap head Date: Wed, 29 Jun 2016 18:32:15 +0800 [thread overview] Message-ID: <1467196340-22079-3-git-send-email-liang.z.li@intel.com> (raw) In-Reply-To: <1467196340-22079-1-git-send-email-liang.z.li@intel.com> Add a new feature which supports sending the page information with a bitmap. The current implementation uses PFNs array, which is not very efficient. Using bitmap can improve the performance of inflating/deflating significantly The page bitmap header will used to tell the host some information about the page bitmap. e.g. the page size, page bitmap length and start pfn. Signed-off-by: Liang Li <liang.z.li@intel.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Amit Shah <amit.shah@redhat.com> --- include/uapi/linux/virtio_balloon.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h index 343d7dd..d3b182a 100644 --- a/include/uapi/linux/virtio_balloon.h +++ b/include/uapi/linux/virtio_balloon.h @@ -34,6 +34,7 @@ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */ #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */ +#define VIRTIO_BALLOON_F_PAGE_BITMAP 3 /* Send page info with bitmap */ /* Size of a PFN in the balloon interface. */ #define VIRTIO_BALLOON_PFN_SHIFT 12 @@ -82,4 +83,22 @@ struct virtio_balloon_stat { __virtio64 val; } __attribute__((packed)); +/* Page bitmap header structure */ +struct balloon_bmap_hdr { + /* Used to distinguish different request */ + __virtio16 cmd; + /* Shift width of page in the bitmap */ + __virtio16 page_shift; + /* flag used to identify different status */ + __virtio16 flag; + /* Reserved */ + __virtio16 reserved; + /* ID of the request */ + __virtio64 req_id; + /* The pfn of 0 bit in the bitmap */ + __virtio64 start_pfn; + /* The length of the bitmap, in bytes */ + __virtio64 bmap_len; +}; + #endif /* _LINUX_VIRTIO_BALLOON_H */ -- 1.8.3.1
next prev parent reply other threads:[~2016-06-29 10:40 UTC|newest] Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-06-29 10:32 [PATCH v2 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 1/7] virtio-balloon: rework deflate to add page to a list Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 2/7] virtio-balloon: define new feature bit and page bitmap head Liang Li 2016-06-29 10:32 ` Liang Li [this message] 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 3/7] mm: add a function to get the max pfn Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 4/7] virtio-balloon: speed up inflate/deflate process Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 5/7] virtio-balloon: define feature bit and head for misc virt queue Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 6/7] mm: add the related functions to get free page info Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [PATCH v2 kernel 7/7] virtio-balloon: tell host vm's " Liang Li 2016-06-29 10:32 ` Liang Li 2016-06-29 10:32 ` [Qemu-devel] " Liang Li 2016-07-06 0:43 ` [PATCH v2 kernel 0/7] Extend virtio-balloon for fast (de)inflating & fast live migration Li, Liang Z 2016-07-06 0:43 ` Li, Liang Z 2016-07-06 0:43 ` [Qemu-devel] " Li, Liang Z 2016-07-06 0:43 ` Li, Liang Z 2016-07-21 8:14 ` Li, Liang Z 2016-07-21 8:14 ` Li, Liang Z 2016-07-21 8:14 ` [Qemu-devel] " Li, Liang Z 2016-07-21 8:14 ` Li, Liang Z 2016-07-26 18:55 ` Michael S. Tsirkin 2016-07-26 18:55 ` [Qemu-devel] " Michael S. Tsirkin 2016-07-26 18:55 ` Michael S. Tsirkin 2016-07-27 1:32 ` [virtio-dev] " Li, Liang Z 2016-07-27 1:32 ` Li, Liang Z 2016-07-27 1:32 ` [Qemu-devel] " Li, Liang Z 2016-07-27 1:32 ` Li, Liang Z 2016-07-27 1:32 ` Li, Liang Z 2016-07-26 18:55 ` Michael S. Tsirkin
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