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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-block] [PATCH] file-posix: unlock qemu_global_mutex before pread when attach disk |
| Date: | Mon, 10 Jun 2019 18:03:13 +0200 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
On 10/06/19 16:51, l00284672 wrote: > The pread will hang in attaching disk just when backend storage network > disconnection . Would the "open" hang as well in that case? > I think the locking range of qemu_global_mutex is too large when do qmp > operation. what > does the qemu_global_mutex really protect? Basically everything. > what is the risk of unlocking qemu_global_mutex in qmp? It's not QMP; it's specifically the code that calls raw_probe_alignment. Paolo
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