projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 06f45fe9 JG |
1 | What: /sys/devices/*/xenbus/event_channels |
| 2 | Date: February 2021 | |
| 3 | Contact: Xen Developers mailing list <xen-devel@lists.xenproject.org> | |
| 4 | Description: | |
| 5 | Number of Xen event channels associated with a kernel based | |
| 6 | paravirtualized device frontend or backend. | |
| 7 | ||
| 8 | What: /sys/devices/*/xenbus/events | |
| 9 | Date: February 2021 | |
| 10 | Contact: Xen Developers mailing list <xen-devel@lists.xenproject.org> | |
| 11 | Description: | |
| 12 | Total number of Xen events received for a Xen pv device | |
| 13 | frontend or backend. | |
| 14 | ||
| 15 | What: /sys/devices/*/xenbus/jiffies_eoi_delayed | |
| 16 | Date: February 2021 | |
| 17 | Contact: Xen Developers mailing list <xen-devel@lists.xenproject.org> | |
| 18 | Description: | |
| 19 | Summed up time in jiffies the EOI of an interrupt for a Xen | |
| 20 | pv device has been delayed in order to avoid stalls due to | |
| 21 | event storms. This value rising is a first sign for a rogue | |
| 22 | other end of the pv device. | |
| 23 | ||
| 24 | What: /sys/devices/*/xenbus/spurious_events | |
| 25 | Date: February 2021 | |
| 26 | Contact: Xen Developers mailing list <xen-devel@lists.xenproject.org> | |
| 27 | Description: | |
| 28 | Number of events received for a Xen pv device which did not | |
| 29 | require any action. Too many spurious events in a row will | |
| 30 | trigger delayed EOI processing. | |
| 31 | ||
| 32 | What: /sys/devices/*/xenbus/spurious_threshold | |
| 33 | Date: February 2021 | |
| 34 | Contact: Xen Developers mailing list <xen-devel@lists.xenproject.org> | |
| 35 | Description: | |
| 36 | Controls the tolerated number of subsequent spurious events | |
| 37 | before delayed EOI processing is triggered for a Xen pv | |
| 38 | device. Default is 1. This can be modified in case the other | |
| 39 | end of the pv device is issuing spurious events on a regular | |
| 40 | basis and is known not to be malicious on purpose. Raising | |
| 41 | the value for such cases can improve pv device performance. |