Bug 719237
Summary: | Kdump failed with intel_iommu=on | |||
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Product: | Red Hat Enterprise Linux 5 | Reporter: | Chao Ye <cye> | |
Component: | kernel | Assignee: | Dave Young <ruyang> | |
Status: | CLOSED WONTFIX | QA Contact: | Red Hat Kernel QE team <kernel-qe> | |
Severity: | medium | Docs Contact: | ||
Priority: | unspecified | |||
Version: | 5.7 | CC: | cbuissar | |
Target Milestone: | rc | Flags: | cbuissar:
needinfo+
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Target Release: | --- | |||
Hardware: | x86_64 | |||
OS: | Linux | |||
Whiteboard: | ||||
Fixed In Version: | Doc Type: | Bug Fix | ||
Doc Text: |
Important: Disable IOMMU on Intel Chipsets
A limitation in the current implementation of the Intel IOMMU driver can occasionally prevent the kdump service from capturing the core dump image. To use kdump on Intel architectures reliably, it is advised that the IOMMU support is disabled.
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Story Points: | --- | |
Clone Of: | ||||
: | 852604 1196263 (view as bug list) | Environment: | ||
Last Closed: | 2012-08-29 04:38:01 UTC | Type: | --- | |
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: | ||||
Bug Blocks: | 852604, 1196263 |
Description
Chao Ye
2011-07-06 07:31:57 UTC
Please try: "intel_iommu=on iommu=pt" It works for me on ibm-x3550m3-01.rhts.eng.nay.redhat.com, but this machine does not hang at same point it hangs after some DMAR fault Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Important: Disable IOMMU on Intel Chipsets A limitation in the current implementation of the Intel IOMMU driver can occasionally prevent the kdump service from capturing the core dump image. To use kdump on Intel architectures reliably, it is advised that the IOMMU support is disabled. |