Bug 1618466
Summary: | RT system hang due to wrong of rq's nr_running [MRG-RT] | ||
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Product: | Red Hat Enterprise MRG | Reporter: | Beth Uptagrafft <bhu> |
Component: | realtime-kernel | Assignee: | Clark Williams <williams> |
Status: | CLOSED ERRATA | QA Contact: | Jiri Kastner <jkastner> |
Severity: | urgent | Docs Contact: | Marie Hornickova <mdolezel> |
Priority: | high | ||
Version: | 2.5 | CC: | bhu, crwood, dhoward, jiang.biao2, jkastner, lgoncalv, mkolaja, tian.yongjiang |
Target Milestone: | --- | Keywords: | ZStream |
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | 3.10.0-693.38.1.rt56.628.el6rt | Doc Type: | Bug Fix |
Doc Text: |
Previously, preemption was enabled too early after a context switch. If a task was migrated to another CPU after a context switch, a mismatch between CPU and runqueue during load balancing sometimes occurred. Consequently, a runnable task on an idle CPU failed to run, and the operating system became unresponsive. This update disables preemption in the schedule_tail() function. As a result, CPU migration during post-schedule processing no longer occurs, which prevents the above mismatch. The operating system no longer hangs due to this bug.
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Story Points: | --- |
Clone Of: | 1608672 | Environment: | |
Last Closed: | 2018-09-25 20:21:47 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 1608672 | ||
Bug Blocks: | 1541534, 1617941 |
Comment 2
Clark Williams
2018-08-27 18:14:08 UTC
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2018:2789 |