XS Japan 2008 IA64 Status Japanese

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The Linux Foundation

Isaku Yamahata: Paravirt_ops/IA64 Status Update

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paravirt_ops/IA64 status update

Isaku Yamahata <yamahata@valinux.co.jp>
VA Linux Systems Japan K.K.

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?
●

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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