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We were looking at the behavior of hald on a Linux host (Ubuntu 12.04.2 LTS 64-bit). We looked at both its syslog and system calls (using strace). According to the ...
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- 01-24-2014 #1
- Join Date
- Jan 2014
hald (HAL daemon) behavior analysis
hald: 22:26:33.665 [I] osspec.c:256: SEQNUM=541371, ACTION=add, SUBSYSTEM=queues, DEVPATH=/sys/devices/virtual/net/lo/queues/rx-0, DEVNAME=, IFINDEX=0
hald: 22:26:33.665 [D] hotplug.c:476: checking ADD event /sys/devices/virtual/net/lo/queues/rx-0
hald: 22:26:33.665 [D] hotplug.c:397: event /sys/devices/virtual/net/lo/queues/rx-0: skip ourselves and all later events
hald: 22:26:33.665 [I] osspec.c:1022: hal_util_find_known_parent: '/sys/devices/virtual/net/lo/queues/rx-0/sys/devices/virtual/net/lo'
hald: 22:26:33.665 [I] device.c:4997: add_dev: subsys=queues sysfs_path=/sys/devices/virtual/net/lo/queues/rx-0 dev= parent_dev=0x01d66980
hald: 22:26:33.665 [D] hotplug.c:500: events queued = 0, events in progress = 0
hald: 22:26:33.665 [D] hotplug.c:505: Hotplug-queue empty now ... no hotplug events in progress
- 01-24-2014 #2
- Join Date
- Dec 2013
- Victoria, B.C. Canada
I don't know for sure but lo is the loopback device - a virtual network interface used for localhost so you could see this any time a process is opening a local socket. queue/rx-0 refers to the network send/receive queue for processor 0 I believe. Note that it's a virtual device.