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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:24:58 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:27:06 +0000
commit33606b41d35115f887ea688b1a16f2ff85bf2fe4 (patch)
tree406b2c7b19a087ba437c68f3dbf0b589fa1d6150 /results/scraper/launchpad-without-comments/530077
parentadedf8771bc4de3113041ca21bd4d0d1c0014b6a (diff)
downloademulator-bug-study-33606b41d35115f887ea688b1a16f2ff85bf2fe4.tar.gz
emulator-bug-study-33606b41d35115f887ea688b1a16f2ff85bf2fe4.zip
add launchpad bug reports without comments
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+kvm: 16-bit code execution failure should be more friendly
+
+Today, when kvm fails at 16-bit code execution, we report:
+
+     spirit:~/qemu> qemu-kvm ./hda-fedora.img 
+     kvm: unhandled exit 80000021
+     kvm_run returned -22
+
+There are three reasons exit reason 21 happens.  The first is that a user is executing an image containing a workload that uses GFXBOOT or some other bootloader that exercises big real mode.  On pre-Westmere Intel processors, VT could not handle big real mode.  The second reason is that the guest's image is corrupted and we're executing random code.  We accidentally fall into one of the unsupported modes for VT.  Again, this is addressed on WSM.  The third case is where there's an actual bug in KVM.  This should be exceedingly rare at this stage.
+
+We should present a friendly error message explaining the possible causes and recommending corrective action.
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