From: "Jürgen Groß" <jgross@suse.com>
To: David Miller <davem@davemloft.net>, pdurrant@amazon.com
Cc: xen-devel@lists.xenproject.org, wei.liu@kernel.org,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [Xen-devel] [PATCH net-next] xen-netback: get rid of old udev related code
Date: Fri, 13 Dec 2019 06:40:38 +0100 [thread overview]
Message-ID: <cefcf3a4-fc10-d62a-cac9-81f0e47710a8@suse.com> (raw)
In-Reply-To: <20191212.110513.1770889236741616001.davem@davemloft.net>
On 12.12.19 20:05, David Miller wrote:
> From: Paul Durrant <pdurrant@amazon.com>
> Date: Thu, 12 Dec 2019 13:54:06 +0000
>
>> In the past it used to be the case that the Xen toolstack relied upon
>> udev to execute backend hotplug scripts. However this has not been the
>> case for many releases now and removal of the associated code in
>> xen-netback shortens the source by more than 100 lines, and removes much
>> complexity in the interaction with the xenstore backend state.
>>
>> NOTE: xen-netback is the only xenbus driver to have a functional uevent()
>> method. The only other driver to have a method at all is
>> pvcalls-back, and currently pvcalls_back_uevent() simply returns 0.
>> Hence this patch also facilitates further cleanup.
>>
>> Signed-off-by: Paul Durrant <pdurrant@amazon.com>
>
> If userspace ever used this stuff, I seriously doubt you can remove this
> even if it hasn't been used in 5+ years.
Hmm, depends.
This has been used by Xen tools in dom0 only. If the last usage has been
in a Xen version which is no longer able to run with current Linux in
dom0 it could be removed. But I guess this would have to be a rather old
version of Xen (like 3.x?).
Paul, can you give a hint since which Xen version the toolstack no
longer relies on udev to start the hotplug scripts?
Juergen
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next prev parent reply other threads:[~2019-12-13 5:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-12 13:54 [Xen-devel] [PATCH net-next] xen-netback: get rid of old udev related code Paul Durrant
2019-12-12 16:31 ` Jason Andryuk
2019-12-12 16:45 ` Durrant, Paul
2019-12-12 19:05 ` David Miller
2019-12-13 5:40 ` Jürgen Groß [this message]
2019-12-13 9:24 ` Durrant, Paul
2019-12-13 10:02 ` Jürgen Groß
2019-12-13 10:12 ` Durrant, Paul
2019-12-16 8:10 ` Jürgen Groß
2019-12-16 8:18 ` Durrant, Paul
2019-12-16 8:29 ` Jürgen Groß
2020-01-09 13:55 ` Rich Persaud
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