update multinic filter to pick only pci devices

[polytan]

Verified there are some docker interfaces that was not excluded from the filter, this change aim to just setup IRQ for pci devices.

[google-oss-prow[bot]]

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[a-crate]

Excluding /sys/devices/virtual seems more in line with the original filter intent than only including pci devices, and should still exclude docker's NIC. I'm not aware of any non-pci NICs that need to be included but I'm hesitant about making new assumptions without supporting reasons.

/ok-to-test

[dorileo]

@a-crate

Do you mean doing grep -v /sys/devices/virtual rather than grep '/sys/devices/pci'?

[a-crate]

Yes, exactly.

[polytan]

I might not expert, but will it has other type of devices here? I assume we have, but above change applies for A3 only: https://github.com/GoogleCloudPlatform/guest-configs/blob/master/src/usr/bin/google_set_multiqueue#L212

if ! is_a3_platform; then
  exit
fi

A3 NICs are under PCIe switch, that's why I'm prefer grep '/sys/devices/pci'.

[a-crate]

Seems reasonable enough to do this only on A3. I am not an approver for this repo anyway, Leo will need to give the ok as well before merge. /lgtm

[a-crate]

/assign @dorileo

[dorileo]

/approve

[google-oss-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dorileo, polytan

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[dorileo]

/lgtm