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paravirt_ops/IA64 status update




 Isaku Yamahata <yamahata@valinux.co.jp>
 VA Linux Systems Japan K.K.
IA64 paravirt_ops/xen マージ
現在の開発状況及び予定
Items                                       status
minimal domU     pv_ops                     done(2.6.27)
                                            done(2.6.28)
                 Xen/domU
domU 2nd Phase   more .S paravirtualization patch posted
                 save/restore               patch posted
                 binary patch               now coding
                 balloon expantion
                 free unused pages
                                                  skip to dom0(?)
                 irq balance
                 spin lock
dom0             ioremap
                 pci device scanning
                 DMA API
                                               investigation needed
                 kexec/kdump
                                              catch up the x86 work
                 PMU/PMD/PMC(xenoprof)
                 mca
                 and more?

                                                   done
                                                   work in progress
                                                   not started yet
DomU 第二フェーズ: 最適化
    残った.Sの準仮想化
●



        実装、投稿済み。レビュー中
    –

    バイナリパッチ
●



        作業中
    –

        呼出規約は議論の余地あり
    –

            Non-banked static registers(現在Xen方式)
        ●


                 try this first.
             –

            Banked Static registers(PAL類似)
        ●



            Stacked registers(C関数呼出類似)
        ●



        フレームワークは以前実験的に実装したものから流
    –
        用
DomU 第二フェーズ: 機能強化
    save/restore:
●



        実装、投稿済み。レビュー中
    –

    バルーン拡張: x86の実装待ち。Dom0サポート
●


    を優先。
        バルーン拡張とライブマイグレーション間に競合あ
    –
        り
            ログダーティーモードAPIの拡張が必要と思われる
        ●



        Xenカーネルだけでなくてツールスタックへの変更
    –
        も必要
        X86でもまだ実装しきっていない
    –

            現在カーネルへの修正のみ
        ●
DomU 第二フェーズ: 機能強化
               (cont.)
    dom0サポートを優先:下記機能は必須機能では
●


    ない
        不使用ページの解放
    –

             高々数百キロバイト
         ●



        Irq balance
    –

             Irqbalancedを停止すれば良い
         ●



        スピンロック
    –

             チケットスピンロックの悪影響がある?
         ●



             問題報告がある?
         ●



             独立に作業できるのでとりあえずdom0優先
         ●
Dom0対応
    X86の作業のキャッチアップ
●



        X86 dom0の作業が落ち着くまで待つ
    –

        イベントチャネルは大幅に書き変わった
    –

            Ia64対応が必要そう
        ●



        共通コードで追加されたもののチェック
    –

            privcmdドライバ
        ●



            バックエンドドライバ
        ●
Dom0対応(cont.)
    まずは調査が必要
●



    ioremap()
●



    PCIデバイス探査
●



    DMA API
●



        VT-d対応でIA64 DMA APIの実装が変更された
    –

        x86とコードの共有?
    –

    kexec/kdump
●



    Ia64 マシンベクタとの共存方法?
●
質疑応答
ご静聴ありがとうございました
    http://wiki.xensource.com/xenwiki/XenIA64/
●


    UpstreamMerge

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XS Japan 2008 IA64 Status Japanese

  • 1. paravirt_ops/IA64 status update Isaku Yamahata <yamahata@valinux.co.jp> VA Linux Systems Japan K.K.
  • 3. 現在の開発状況及び予定 Items status minimal domU pv_ops done(2.6.27) done(2.6.28) Xen/domU domU 2nd Phase more .S paravirtualization patch posted save/restore patch posted binary patch now coding balloon expantion free unused pages skip to dom0(?) irq balance spin lock dom0 ioremap pci device scanning DMA API investigation needed kexec/kdump catch up the x86 work PMU/PMD/PMC(xenoprof) mca and more? done work in progress not started yet
  • 4. DomU 第二フェーズ: 最適化 残った.Sの準仮想化 ● 実装、投稿済み。レビュー中 – バイナリパッチ ● 作業中 – 呼出規約は議論の余地あり – Non-banked static registers(現在Xen方式) ● try this first. – Banked Static registers(PAL類似) ● Stacked registers(C関数呼出類似) ● フレームワークは以前実験的に実装したものから流 – 用
  • 5. DomU 第二フェーズ: 機能強化 save/restore: ● 実装、投稿済み。レビュー中 – バルーン拡張: x86の実装待ち。Dom0サポート ● を優先。 バルーン拡張とライブマイグレーション間に競合あ – り ログダーティーモードAPIの拡張が必要と思われる ● Xenカーネルだけでなくてツールスタックへの変更 – も必要 X86でもまだ実装しきっていない – 現在カーネルへの修正のみ ●
  • 6. DomU 第二フェーズ: 機能強化 (cont.) dom0サポートを優先:下記機能は必須機能では ● ない 不使用ページの解放 – 高々数百キロバイト ● Irq balance – Irqbalancedを停止すれば良い ● スピンロック – チケットスピンロックの悪影響がある? ● 問題報告がある? ● 独立に作業できるのでとりあえずdom0優先 ●
  • 7. Dom0対応 X86の作業のキャッチアップ ● X86 dom0の作業が落ち着くまで待つ – イベントチャネルは大幅に書き変わった – Ia64対応が必要そう ● 共通コードで追加されたもののチェック – privcmdドライバ ● バックエンドドライバ ●
  • 8. Dom0対応(cont.) まずは調査が必要 ● ioremap() ● PCIデバイス探査 ● DMA API ● VT-d対応でIA64 DMA APIの実装が変更された – x86とコードの共有? – kexec/kdump ● Ia64 マシンベクタとの共存方法? ●
  • 10. ご静聴ありがとうございました http://wiki.xensource.com/xenwiki/XenIA64/ ● UpstreamMerge