group.of.nepali.translators team mailing list archive

[Po-Hsu Lin <1912316@xxxxxxxxxxxxxxxxxx>]

In Xenial source code, the warning was triggered here in ioat_dca_init()
of drivers/dma/ioat/dca.c:

        if (dca3_tag_map_invalid(ioatdca->tag_map)) {
                WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND,
                                "%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n",
                                dev_driver_string(&pdev->dev),
                                dev_name(&pdev->dev));
                free_dca_provider(dca);
                return NULL;
        }

This is the WARNING in log_check, I think it generates the tainted flag
as well.

The code was later replaced by:
https://github.com/torvalds/linux/commit/036e9ef8becde736e693be4f4bef56d5b56fc298
#diff-a6ce63e9c9f1a0aac9223c055a717e8fd34d3a4793a3166e4a9bb3b6d1c54c9f

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1912316

Title:
  log_check / kernel_tainted test from ubuntu_boot failed on Intel Cloud
  node grumman

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  New
Status in linux source package in Xenial:
  New

Bug description:
  Issue found on node grumman, this is not a regression.

  The kernel_tainted check reports a non-zero flag 2048, this means
  "workaround for bug in platform firmware applied"

  log_check reports WARNINGs found in the dmesg:

  10.	01/06 09:46:51 INFO |ubuntu_boo:0030| kernel: [ 7.852005] WARNING: CPU: 0 PID: 179 at /build/linux-0dlxvs/linux-4.4.0/drivers/dma/ioat/dca.c:342 ioat_dca_init+0x17c/0x1a0 [ioatdma]()
  11.	01/06 09:46:51 INFO |ubuntu_boo:0030| kernel: [ 5.387292] WARNING: CPU: 0 PID: 181 at /build/linux-7Nk88i/linux-4.4.0/drivers/dma/ioat/dca.c:342 ioat_dca_init+0x17c/0x1a0 [ioatdma]()
  12.	01/06 09:46:51 INFO |ubuntu_boo:0030| kernel: [ 6.039705] WARNING: CPU: 0 PID: 4 at /build/linux-7Nk88i/linux-4.4.0/drivers/dma/ioat/dca.c:342 ioat_dca_init+0x17c/0x1a0 [ioatdma]()

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