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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2040652
Title:
megaraid_sas: DMA errors detected during IO operations
Status in linux package in Ubuntu:
Incomplete
Bug description:
system config:
- SMC server (super micro server)
- Ubuntu 22.04 LTS OS
- Aero iMR storage controller
Issue:
Recently, we have encountered DMA errors in the Aero iMR controller,
a lighter version of the Aero MR controller. The firmware of Aero iMR
utilizes host memory for its operations, with BIOS setting aside 128MB
of host memory for the Aero iMR PCI device. The OS is then instructed to
reserve this address in its IVRS table. Despite this reservation, we are
experiencing DMA errors when the firmware performs DMA operations on this
allocated host memory. We are investigating the cause of these errors and
need ubuntu OS team assistance on this.
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