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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] smp broken in tcg mode with --enable-io-thread? |
Date: | Fri, 18 Jun 2010 14:53:20 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100423 Lightning/1.0b1 Thunderbird/3.0.4 |
On 06/18/2010 11:37 AM, Jan Kiszka wrote:
Hi, looks like SMP in emulation mode is broken once --enable-io-thread is turned on. Linux SMP guests lock up early during boot, often the whole QEMU process becomes uncontrollable after a while. That's at least the case here with x86 targets. The problem disappears when using -enable-kvm or building without --enable-io-thread.
That's unfortunate. I've been thinking we should enable io thread by default but this sort of regression would certainly prevent that.
Glauber/Marcelo, any guesses about what's happening? Regards, Anthony Liguori
It's not on my critical path (ie. no time to go into details), I just stumbled over it and wanted to drop a note. Jan
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