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Re: [Qemu-devel] [PATCH] dump: Acquire BQL around vm_start() in dump thr
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From: |
Fam Zheng |
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Subject: |
Re: [Qemu-devel] [PATCH] dump: Acquire BQL around vm_start() in dump thread |
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Date: |
Wed, 3 May 2017 15:42:40 +0800 |
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User-agent: |
Mutt/1.8.0 (2017-02-23) |
On Wed, 05/03 15:28, Fam Zheng wrote:
> This fixes an assertion failure in the following backtrace:
>
> __GI___assert_fail
> memory_region_transaction_commit
> memory_region_add_eventfd
> virtio_pci_ioeventfd_assign
> virtio_bus_set_host_notifier
> virtio_blk_data_plane_start
> virtio_bus_start_ioeventfd
> virtio_vmstate_change
> vm_state_notify
> vm_prepare_start
> vm_start
> dump_cleanup
> dump_process
> dump_thread
> start_thread
> clone
>
> vm_start need BQL, acquire it if doing cleaning up from main thread.
Oops, s/need/needs and s/main thread/detached thread/.
Fam