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[Qemu-devel] [Bug 1728256] Re: Memory corruption in Windows 10 guest / a

From: Jimi
Subject: [Qemu-devel] [Bug 1728256] Re: Memory corruption in Windows 10 guest / amd64
Date: Thu, 16 Nov 2017 05:22:26 -0000

Specifically 4.12.12, because it seems that was the last version I was
running before this issue started (I was on 4.12.13 when it started). I,
too, can't find any other package upgrade that could have possibly been
the culprit. The timing of my upgrades of any qemu or libvirt packages
rule them out.

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  Memory corruption in Windows 10 guest / amd64

Status in QEMU:

Bug description:
  I have a Win 10 Pro x64 guest inside a qemu/kvm running on an Arch x86_64 
host. The VM has a physical GPU passed through, as well as the physical USB 
controllers, as well as a dedicated SSD attached via SATA; you can find the 
complete libvirt xml here: https://pastebin.com/U1ZAXBNg
  I built qemu from source using the qemu-minimal-git AUR package; you can find 
the build script here: 
https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=qemu-minimal-git (if you 
aren't familiar with Arch, this is essentially a bash script where build() and 
package() are run to build the files, and then install them into the $pkgdir to 
later tar them up.)

  Starting with qemu v2.10.0, Windows crashes randomly with a bluescreen
  about CRITICAL_STRUCTURE_CORRUPTION. I also tested the git heads
  f90ea7ba7c, 861cd431c9 and e822e81e35, before I went back to v2.9.0,
  which is running stable for over 50 hours right now.

  During my tests I found that locking the memory pages alleviates the
  problem somewhat, but never completely avoids it. However, with the
  crashes occuring randomly, that could as well be false conclusions; I
  had crashes within minutes after boot with that too.

  I will now start `git bisect`ing; if you have any other suggestions on
  what I could try or possible patches feel free to leave them with me.

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