Ticket #1931 (closed bug: fixed)

Opened 2 years ago

Last modified 2 years ago

Negative Modified Page Queue Count

Reported by: bonefish Owned by: axeld
Priority: critical Milestone: R1/alpha1
Component: System/Kernel Version: R1/pre-alpha1
Keywords: Cc:
Blocked By: Platform: All
Blocking:

Description

r24417, VMware

While running a relatively harmless Perl test the page writer suddenly and unmotivatedly started to hog the CPU. As the attachment shows the count of the modified queue has become -1, which causes the semaphore acquisition to be skipped (sModifiedTemporaryPages is unsigned).

Attachments

kdl-session-berserking-page-writer Download (4.6 KB) - added by bonefish 2 years ago.

Change History

Changed 2 years ago by bonefish

Changed 2 years ago by bonefish

  • status changed from new to closed
  • resolution set to fixed

Probably fixed in r24430. That race condition would be a good explanation at least.

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