VM调优

• Fast IPI(https://lkml.org/lkml/2019/11/9/8)

• Fast IPI enhancement(https://lkml.org/lkml/2020/3/25/1221)

• Broadcast-IPI optimization(https://lwn.net/Articles/758906/)

• PV TLB shootdown(https://lwn.net/Articles/740363/)

• Fast TSC Deadline timer(https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg2148747.htm)

• Exitless LAPIC timer(https://lkml.org/lkml/2019/6/6/22)

• Support timer passthrough for VM(https://lkml.org/lkml/2021/2/5/1291)

• Exitless hlt/mwait/pause(https://lkml.org/lkml/2018/3/12/359)

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