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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: Tue, 21 Nov 2017 21:09:20 -0000

I have yet to try disabling swap, but in the 5 days since I downgraded
the kernel to 4.12.12 from 4.12.13, I have not had a single BSOD. I
think 4.12.13 is the culprit.

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https://bugs.launchpad.net/bugs/1728256

Title:
  Memory corruption in Windows 10 guest / amd64

Status in QEMU:
  New

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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