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[Qemu-devel] [Bug 1769189] Re: Issue with qemu 2.12.0 + SATA

From: John Snow
Subject: [Qemu-devel] [Bug 1769189] Re: Issue with qemu 2.12.0 + SATA
Date: Thu, 31 May 2018 00:25:26 -0000

There might be multiple issues present and I'm having difficulty
reliably doing any kind of regression testing here, but I think this
patch helps fix at least one of the issues I was seeing that occurs
specifically during early boot. It may fix other hangs.

** Patch added: "sata.patch"

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  Issue with qemu 2.12.0 + SATA

Status in QEMU:

Bug description:
  [EDIT: I first thought that OVMF was the issue, but it turns out to be

  I had a Windows 10 VM running perfectly fine with a SATA drive, since
  I upgraded to qemu 2.12, the guests hangs for a couple of minutes,
  works for a few seconds, and hangs again, etc. By "hang" I mean it
  doesn't freeze, but it looks like it's waiting on IO or something, I
  can move the mouse but everything needing disk access is unresponsive.

  What doesn't work: qemu 2.12 with SATA
  What works: using VirIO-SCSI with qemu 2.12 or downgrading qemu to 2.11.1 and 
keep using SATA.

  Platform is arch linux 4.16.7 on skylake and Haswell, I have attached
  the vm xml file.

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