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[Qemu-devel] Fwd: virtio_scsi_ctx_check failed when detach virtio_scsi d
From: |
l00284672 |
Subject: |
[Qemu-devel] Fwd: virtio_scsi_ctx_check failed when detach virtio_scsi disk |
Date: |
Tue, 16 Jul 2019 10:06:30 +0800 |
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Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 |
-------- Forwarded Message --------
Subject: virtio_scsi_ctx_check failed when detach virtio_scsi disk
Date: Mon, 15 Jul 2019 23:34:24 +0800
From: l00284672 <address@hidden>
To: address@hidden, address@hidden, Stefan Hajnoczi
<address@hidden>, Paolo Bonzini <address@hidden>
CC: address@hidden
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?
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