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From: | Peter Maydell |
Subject: | Re: [Qemu-devel] [Bug 1706296] Re: Booting NT 4 disk causes /home/rjones/d/qemu/cpus.c:1580:qemu_mutex_lock_iothread: assertion failed: (!qemu_mutex_iothread_locked()) |
Date: | Fri, 18 Aug 2017 09:59:41 +0100 |
On 18 August 2017 at 09:40, Alex Bennée <address@hidden> wrote: > > John Arbuckle <address@hidden> writes: > >> Using '-cpu 486' gets past the assertion error. I guess Windows NT 4.0 >> is not compatible with newer Intel processors. > > It might be related. The assertion error is caused by the fact an > exception has occurred and processor is trying to dump a stack frame that > overlaps from RAM into device memory. As the IRQ/exception handling is > already under the BQL (as it changes machine state) we get the assertion > when it tries to take the BQL a second time when accessing device > memory. This sounds worrying -- lots and lots of target backend code does writes to memory. Is it all going to cause assertions if it happens to be pointing at a device? thanks -- PMM
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