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Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate process

From Dave Hansen <dave.hansen@intel.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate process
Date 2016-07-27 18:10 +0200
Message-ID <rZzzb-1Cb-7@gated-at.bofh.it> (permalink)
References <rZlZf-1d6-3@gated-at.bofh.it> <rZlZf-1d6-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 07/26/2016 06:23 PM, Liang Li wrote:
> +	vb->pfn_limit = VIRTIO_BALLOON_PFNS_LIMIT;
> +	vb->pfn_limit = min(vb->pfn_limit, get_max_pfn());
> +	vb->bmap_len = ALIGN(vb->pfn_limit, BITS_PER_LONG) /
> +		 BITS_PER_BYTE + 2 * sizeof(unsigned long);
> +	hdr_len = sizeof(struct balloon_bmap_hdr);
> +	vb->bmap_hdr = kzalloc(hdr_len + vb->bmap_len, GFP_KERNEL);

This ends up doing a 1MB kmalloc() right?  That seems a _bit_ big.  How
big was the pfn buffer before?

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[PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate process Liang Li <liang.z.li@intel.com> - 2016-07-27 03:40 +0200
  Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process Dave Hansen <dave.hansen@intel.com> - 2016-07-27 18:10 +0200
    Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-27 23:40 +0200
      RE: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-28 05:40 +0200
        Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-29 00:20 +0200
          RE: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-29 03:10 +0200
    RE: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-28 03:20 +0200
      Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-28 03:50 +0200
        RE: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-28 08:40 +0200
          Re: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-29 00:00 +0200
            RE: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-29 02:50 +0200
            Re: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process Dave Hansen <dave.hansen@intel.com> - 2016-07-29 21:50 +0200
              RE: [virtio-dev] Re: [PATCH v2 repost 4/7] virtio-balloon: speed up  inflate/deflate process "Li, Liang Z" <liang.z.li@intel.com> - 2016-08-02 02:40 +0200
  Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-27 23:40 +0200
    RE: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-28 05:10 +0200
      Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-29 00:20 +0200
        RE: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-29 02:40 +0200
  Re: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Michael S. Tsirkin" <mst@redhat.com> - 2016-07-28 00:10 +0200
    RE: [PATCH v2 repost 4/7] virtio-balloon: speed up inflate/deflate  process "Li, Liang Z" <liang.z.li@intel.com> - 2016-07-28 05:50 +0200

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