Bug 238708 - remount-ro hangs
Summary: remount-ro hangs
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 11.2-RELEASE
Hardware: Any Any
: --- Affects Some People
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-19 17:46 UTC by aler
Modified: 2019-08-08 02:02 UTC (History)
1 user (show)

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Description aler 2019-06-19 17:46:43 UTC 
Unfortunately currently I have not enough information about this problem, but I'm sure there is some problem or problems.

1) multiple times I observed very long remount-ro (mount -u -o ro) for some partition with a lot of disk activity from mount program during that. All that was some time ago and currently I forgot details. I'm not sure that this issue still exists in 11.2-RELEASE but i think it is related to next one.

2) Recent one:
  "mount -u -o ro" was hanged for a few second and then wrote "mount: /path/to/mountpoint: Resource temporarily unavailable"
  Second attempt of "mount -u -o ro" resulted in deadlock in "suspwt" state of mount program. A lot of processes was deadlocked in state "suspfs". Not sure which of them appeared first.
  There was no disk activity (in gstat) for remounted partition during this deadlock.