On focal, this reproduces with 5.4 and 5.15 kernels. One of the causes for the delay is that udev is reading efivars for secure boot, which takes 0.3 seconds. And it does it multiple times.
When running a 5.19 kernel on focal, however, the test seems to be able to detach the device before udev starts reading the efivars. Same udev version here. Perhaps events are pushed in a different order? Cascardo. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1999554 Title: LTP uevent01 will fail on GCP n2d-standard-64 Status in linux package in Ubuntu: New Bug description: Because udev takes too long to release the loop device, LTP test uevent01 (and some other tests) may warn about not being able to detach the loop device. This is identified as a failure. ubuntu@selfprovisioned-cascardo-n2d:~$ sudo ./uevent01 tst_test.c:1423: TINFO: Timeout per run is 0h 05m 00s tst_device.c:88: TINFO: Found free device 6 '/dev/loop6' uevent01.c:24: TINFO: Attaching device /dev/loop6 uevent.h:49: TINFO: Got uevent: uevent.h:52: TINFO: change@/devices/virtual/block/loop6 uevent.h:52: TINFO: ACTION=change uevent.h:52: TINFO: DEVPATH=/devices/virtual/block/loop6 uevent.h:52: TINFO: SUBSYSTEM=block uevent.h:52: TINFO: DISK_MEDIA_CHANGE=1 uevent.h:52: TINFO: MAJOR=7 uevent.h:52: TINFO: MINOR=6 uevent.h:52: TINFO: DEVNAME=loop6 uevent.h:52: TINFO: DEVTYPE=disk uevent.h:52: TINFO: DISKSEQ=7 uevent.h:52: TINFO: SEQNUM=2959 uevent.h:140: TPASS: Got expected UEVENT uevent.h:49: TINFO: Got uevent: uevent.h:52: TINFO: change@/devices/virtual/block/loop6 uevent.h:52: TINFO: ACTION=change uevent.h:52: TINFO: DEVPATH=/devices/virtual/block/loop6 uevent.h:52: TINFO: SUBSYSTEM=block uevent.h:52: TINFO: MAJOR=7 uevent.h:52: TINFO: MINOR=6 uevent.h:52: TINFO: DEVNAME=loop6 uevent.h:52: TINFO: DEVTYPE=disk uevent.h:52: TINFO: DISKSEQ=7 uevent.h:52: TINFO: SEQNUM=2960 uevent.h:140: TPASS: Got expected UEVENT uevent01.c:26: TINFO: Detaching device /dev/loop6 tst_device.c:254: TWARN: ioctl(/dev/loop6, LOOP_CLR_FD, 0) no ENXIO for too long Summary: passed 2 failed 0 broken 0 skipped 0 warnings 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1999554/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
