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dump: Acquire BQL around vm_start() in dump thread

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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.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170503072819.14462-1-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Fam Zheng 2017-05-03 15:28:19 +08:00 • committed by Paolo Bonzini
parent 8a3c3d996e
commit 6796b4008b
2 changed files with 8 additions and 0 deletions
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1
include/sysemu/dump.h
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@ -157,6 +157,7 @@ typedef struct DumpState {
uint32_t sh_info;
bool have_section;
bool resume;
bool detached;
ssize_t note_size;
hwaddr memory_offset;
int fd;