|
| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH 5/8] virtio-blk: fix "disabled data plane" mode |
| Date: | Wed, 9 Mar 2016 13:55:27 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
On 09/03/2016 13:21, Christian Borntraeger wrote:
> I have some random crashes at startup
>
> Stack trace of thread 48326:
> #0 0x000002aa2e0cce46 bdrv_co_do_rw (qemu-system-s390x)
> #1 0x000002aa2e159e8e coroutine_trampoline
> (qemu-system-s390x)
> #2 0x000003ffbc35150a __makecontext_ret (libc.so.6)
>
>
> that I was able to bisect.
> commit 2906cddfecff21af20eedab43288b485a679f9ac does crash regularly,
> 2906cddfecff21af20eedab43288b485a679f9ac^ does not.
>
> I will try to find somebody that looks into that - unless you have an idea.
The only random idea is to move
vblk->dataplane_started = true
to the beginning of virtio_blk_data_plane_start rather than the end.
Paolo
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