From: Richard Henderson <rth@twiddle.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1824768] Re: Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work
Date: Sun, 21 Apr 2019 19:48:48 -0000 [thread overview]
Message-ID: <155587612901.7202.10344473436376690538.launchpad@chaenomeles.canonical.com> (raw)
In-Reply-To: 155531602468.14046.8896369782282114161.malonedeb@gac.canonical.com
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1824768
Title:
Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work
Status in QEMU:
Incomplete
Bug description:
Using any Linux image (in this case Alpine Linux iso) I want to
utilise all cores of my Raspberry with --accel,thread=multi. I know
there is a probably still problem with memory ordering of the host,
but I have also seen some very old commits which could potentially
help with it.
But anyway, with version qemu-i386 version 3.1.0 (Debian 1:3.1+dfsg-7)
I can see OpenRC starting up services and then the kernel crash.
With version QEMU emulator version 3.1.93 (v4.0.0-rc3-dirty)
The whole machine crash with this error:
Illegal instruction
Using command:
./qemu-system-i386 -cdrom alpine.iso --accel tcg,thread=multi
Full Console Output:
qemu-system-i386: warning: Guest expects a stronger memory ordering than the host provides
This may cause strange/hard to debug errors
Illegal instruction
Kernel:
Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux
CPU:
ARMv7 Processor rev 5 (v7l)
Features: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm
4 cores
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next prev parent reply other threads:[~2019-04-21 19:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-15 8:13 [Qemu-devel] [Bug 1824768] [NEW] Qemu ARMv7 TCG MultiThreading for i386 guest doesn't work TimeMaster
2019-04-16 13:44 ` [Qemu-devel] [Bug 1824768] " Peter Maydell
2019-04-16 14:05 ` TimeMaster
2019-04-16 14:17 ` Peter Maydell
2019-04-16 14:41 ` TimeMaster
2019-04-16 14:59 ` Peter Maydell
2019-04-16 15:13 ` TimeMaster
2019-04-21 17:58 ` Richard Henderson
2019-04-21 19:48 ` Richard Henderson [this message]
2019-04-22 15:18 ` TimeMaster
2019-06-22 4:17 ` Launchpad Bug Tracker
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