Bug#694513: udev appears to be part of the problem

M Yudkowsky speech at pobox.com
Tue Nov 27 14:38:12 UTC 2012


I noticed that udev consumed about 100% of (both) CPUs. 

udevadm monitor prints out an endless series of complaints:

KERNEL[142913.259475] add      /devices/virtual/bdi/254:7808 (bdi)
UDEV  [142913.260181] add      /devices/virtual/bdi/254:7808 (bdi)
KERNEL[142913.260389] add      /devices/virtual/block/md_d122 (block)
KERNEL[142913.260760] remove   /devices/virtual/bdi/254:7808 (bdi)
UDEV  [142913.260998] remove   /devices/virtual/bdi/254:7808 (bdi)
KERNEL[142913.261058] remove   /devices/virtual/block/md_d122 (block)
UDEV  [142913.264178] add      /devices/virtual/block/md_d122 (block)
UDEV  [142913.264692] remove   /devices/virtual/block/md_d122 (block)


restarting udev clears the problem, which then returns. I'm not clear what's going on here (is udev trying to restart something it thinks exists, or is it trying to grab devices that are in use?) and I'm investigating.



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