ping?


On 2019/7/16 10:06, l00284672 wrote:
>
>
>
>
> -------- Forwarded Message --------
> Subject: 	virtio_scsi_ctx_check failed when detach virtio_scsi disk
> Date: 	Mon, 15 Jul 2019 23:34:24 +0800
> From: 	l00284672 <lizhengui@huawei.com>
> To: 	kwolf@redhat.com, berto@igalia.com, Stefan Hajnoczi 
> <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>
> CC: 	lizhengui@huawei.com
>
>
>
> I found a problem  that virtio_scsi_ctx_check  failed when detaching 
> virtio_scsi disk.  The  bt is below:
>
> (gdb) bt
> #0  0x0000ffffb02e1bd0 in raise () from /lib64/libc.so.6
> #1  0x0000ffffb02e2f7c in abort () from /lib64/libc.so.6
> #2  0x0000ffffb02db124 in __assert_fail_base () from /lib64/libc.so.6
> #3  0x0000ffffb02db1a4 in __assert_fail () from /lib64/libc.so.6
> #4  0x00000000004eb9a8 invirtio_scsi_ctx_check (d=d@entry=0xc70d790, 
> s=<optimized out>, s=<optimized out>)
>     at /Images/lzg/code/710/qemu-2.8.1/hw/scsi/virtio-scsi.c:243
> #5  0x00000000004ec87c in virtio_scsi_handle_cmd_req_prepare 
> (s=s@entry=0xd27a7a0, req=req@entry=0xafc4b90)
>     at /Images/lzg/code/710/qemu-2.8.1/hw/scsi/virtio-scsi.c:553
> #6  0x00000000004ecc20 in virtio_scsi_handle_cmd_vq (s=0xd27a7a0, 
> vq=0xd283410)
>     at /Images/lzg/code/710/qemu-2.8.1/hw/scsi/virtio-scsi.c:588
> #7  0x00000000004eda20 in virtio_scsi_data_plane_handle_cmd (vdev=0x0, 
> vq=0xffffae7a6f98)
>     at /Images/lzg/code/710/qemu-2.8.1/hw/scsi/virtio-scsi-dataplane.c:57
> #8  0x0000000000877254 in aio_dispatch (ctx=0xac61010) at 
> util/aio-posix.c:323
> #9  0x00000000008773ec in aio_poll (ctx=0xac61010, blocking=true) at 
> util/aio-posix.c:472
> #10 0x00000000005cd7cc in iothread_run (opaque=0xac5e4b0) at iothread.c:49
> #11 0x000000000087a8b8 in qemu_thread_start (args=0xac61360) at 
> util/qemu-thread-posix.c:495
> #12 0x00000000008a04e8 in thread_entry_for_hotfix (pthread_cb=0x0) at 
> uvp/hotpatch/qemu_hotpatch_helper.c:579
> #13 0x0000ffffb041c8bc in start_thread () from /lib64/libpthread.so.0
> #14 0x0000ffffb0382f8c in thread_start () from /lib64/libc.so.6
>
> assert(blk_get_aio_context(d->conf.blk) == s->ctx) failed.
>
> I think this patch 
> (https://git.qemu.org/?p=qemu.git;a=commitdiff;h=a6f230c8d13a7ff3a0c7f1097412f44bfd9eff0b) 
> introduce this problem.
>
> commit a6f230c8d13a7ff3a0c7f1097412f44bfd9eff0b  move blockbackend 
> back to main AioContext on unplug. It set the AioContext of
>
> SCSIDevice  to the main AioContex, but s->ctx is still the iothread 
> AioContext.  Is this a bug?
>