On 21.11.24 13:23, Dominique Martinet wrote:
Alexander Merritt wrote on Tue, Nov 19, 2024 at 09:16:33PM +0000:From: Alex Zenla <a...@edera.dev>Large amount of mount hangs observed during hotplugging of 9pfs devices. The 9pfs Xen driver attempts to initialize itself more than once, causing the frontend and backend to disagree: the backend listens on a channel that the frontend does not send on, resulting in stalled processing. Only allow initialization of 9p frontend once.I'm not familiar with the xen bringup so I don't understand how the patch guarantees this -- otherend_changed calls are guaranted to be seralized for a given frontend?
Yes. They are all executed by a single kernel thread. Juergen
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