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virtcontainers: Append max ports to virtio-serial device #2676
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hejianet
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justin-he
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May 11, 2020
Update github.com/intel/govmm. shortlog: 29529a5 Add rt clock definition for rtc clock in qemu 0e98b61 qemu: Add max_ports option to virtio-serial device Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
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May 11, 2020
Govmm has provided a "max_ports" parameter to allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
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May 11, 2020
Govmm has provided a "max_ports" parameter to allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Qemu enables ioeventfd by default for virtio-serial-pci, if max_ports is 31 by default, virtio-serial-bus will add 2+2+30*2=64 virtqueues. It will cost a lot of time overhead during boot time. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
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May 30, 2020
Allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
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to justin-he/runtime
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this issue
Oct 14, 2020
Allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
added a commit
to justin-he/runtime
that referenced
this issue
Oct 14, 2020
Allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
justin-he
added a commit
to justin-he/runtime
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Oct 16, 2020
Allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
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Open PR #2677 not correctly linked here. |
c3d
removed
enhancement
justin-he
added a commit
to justin-he/runtime
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Dec 2, 2020
Allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the boot time and reduce the attack surface. Before this patch on arm64: [ 0.028664] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.055031] printk: console [hvc0] enabled After this patch on arm64: [ 0.028484] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled [ 0.031370] printk: console [hvc0] enabled Fixes: kata-containers#2676 Signed-off-by: Jia He <[email protected]>
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Linking to kata-containers/kata-containers#249 (2.0 placeholder, apparently) |
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Which feature do you think can be improved?
virtcontainers: Append max ports to virtio-serial device
How can it be improved?
Govmm has provided a "max_ports" parameter to allow API consumers to change the maximum number of ports in the virtio-serial devices, setting a lower number of ports can improve the
boot time and reduce the attack surface.
Additional Information
No
Before raising this feature request
Have you looked at the limitations document?
Yes
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