Re: [PATCH] nfs.man: document incompatibility between "bg" option and systemd.

From: Steve Dickson <SteveD@RedHat.com>
To: Lennart Poettering <mzxreary@0pointer.de>
Cc: NeilBrown <neilb@suse.com>,
	systemd-devel@freedesktop.org, linux-nfs@vger.kernel.org
Subject: Re: [PATCH] nfs.man: document incompatibility between "bg" option and systemd.
Date: Wed, 7 Jun 2017 06:04:12 -0400	[thread overview]
Message-ID: <5132dc9e-42a4-feab-2ee8-fcecf1a1cf1f@RedHat.com> (raw)
In-Reply-To: <20170607081257.GH27006@gardel-login>

On 06/07/2017 04:12 AM, Lennart Poettering wrote:
> On Tue, 06.06.17 14:07, Steve Dickson (SteveD@RedHat.com) wrote:
> 
>> Hello,
>>
>> On 05/29/2017 06:19 PM, NeilBrown wrote:
>>>
>>> Systemd does not, and will not, support "bg" correctly.
>>> It has other, better, ways to handle "background" mounting.
>> The only problem with this is bg mounts still work at least
>> up to 4.11 kernel... 
>>
>> It appears there is a problem with a 4.12 kernel. The mount no 
>> longer errors out with ECONNREFUSED it just hangs in the 
>> kernel trying forever... It sounds like a bug to me but 
>> maybe that change was intentional.. Anna?? Trond???
>>
>> So I'm a bit hesitant to commit this since not accurate, yet.
>>
>> Finally, the whole idea of systemd randomly/silently 
>> strip off mount options is crazy... IMHO... 
>>
>> Just because a concept that has been around for years
>> does not fix well in the systemd world it gets
>> rip out??? IDK... but I think we can do better than that.
> 
> Well "bg" doesn't really work on systemd systems, and this was never
> different, hence I think it's only fair to document that it is
> incompatible with systemd. 
I'm seeing it work just fine... 

/etc/fstab: nfssrv:/home/tmp /mnt/tmp nfs bg 0 0
nfssrv is down 
reboot client 
login to client 
# ps ax | grep mount
  980 ?        Ss     0:00 /sbin/mount.nfs nfssrv:/home/tmp /mnt/tmp -o rw,bg

> In addition, I have the suspicion it is not
> used very widely, since I never actually got complaints about it.
Since it seems to be still working we probably would not hear
any complaints about it... 

steved.