linux-kernel - Re: [PATCH] 9p/xen: fix init sequence

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Message-ID: <82dbba56-e803-4332-81f7-225e35048e1e@suse.com>
Date: Thu, 21 Nov 2024 13:00:38 +0100
From: Jürgen Groß <jgross@...e.com>
To: Alexander Merritt <alexander@...ra.dev>, v9fs@...ts.linux.dev,
 linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org
Cc: Eric Van Hensbergen <ericvh@...nel.org>,
 Latchesar Ionkov <lucho@...kov.net>,
 Dominique Martinet <asmadeus@...ewreck.org>,
 Christian Schoenebeck <linux_oss@...debyte.com>,
 Simon Horman <horms@...nel.org>, Alex Zenla <alex@...ra.dev>,
 Ariadne Conill <ariadne@...adne.space>
Subject: Re: [PATCH] 9p/xen: fix init sequence

On 19.11.24 22:16, Alexander Merritt wrote:
> From: Alex Zenla <alex@...ra.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.
> 
> Fixes: c15fe55d14b3b ("9p/xen: fix connection sequence")
> Signed-off-by: Alex Zenla <alex@...ra.dev>
> Signed-off-by: Alexander Merritt <alexander@...ra.dev>
> Signed-off-by: Ariadne Conill <ariadne@...adne.space>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen