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From: Tomasz Pala <gotar@polanet.pl>
To: "Majordomo vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: degraded permanent mount option
Date: Sun, 28 Jan 2018 11:43:40 +0100	[thread overview]
Message-ID: <20180128104340.GA6887@polanet.pl> (raw)
In-Reply-To: <20180128000016.GB16927@polanet.pl>

On Sun, Jan 28, 2018 at 01:00:16 +0100, Tomasz Pala wrote:

> It can't mount degraded, because the "missing" device might go online a
> few seconds ago.

s/ago/after/

>> The central problem is the lack of a timer and time out.
> 
> You got mdadm-last-resort@.timer/service above, if btrfs doesn't lack
> anything, as you all state here, this should be easy to make this work.
> Go ahead please.

And just to make it even easier - this is how you can react to events
inside udev (this is to eliminane btrfs-scan tool being required as it sux):

https://github.com/systemd/systemd/commit/0e8856d25ab71764a279c2377ae593c0f2460d8f

One could even try to trick systemd by SETTING (note the single '=')

ENV{ID_BTRFS_READY}="0"

- which would probably break as soon as btrfs.ko emits next 'changed' event.

-- 
Tomasz Pala <gotar@pld-linux.org>

  reply	other threads:[~2018-01-28 10:43 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-26 14:02 degraded permanent mount option Christophe Yayon
2018-01-26 14:18 ` Austin S. Hemmelgarn
2018-01-26 14:47   ` Christophe Yayon
2018-01-26 14:55     ` Austin S. Hemmelgarn
2018-01-27  5:50     ` Andrei Borzenkov
     [not found]       ` <1517035210.1252874.1249880112.19FABD13@webmail.messagingengine.com>
2018-01-27  6:43         ` Andrei Borzenkov
2018-01-27  6:48           ` Christophe Yayon
2018-01-27 10:08             ` Christophe Yayon
2018-01-27 10:26               ` Andrei Borzenkov
2018-01-27 11:06                 ` Tomasz Pala
2018-01-27 13:26                   ` Adam Borowski
2018-01-27 14:36                     ` Goffredo Baroncelli
2018-01-27 15:38                       ` Adam Borowski
2018-01-27 15:22                     ` Duncan
2018-01-28  0:39                       ` Tomasz Pala
2018-01-28 20:02                         ` Chris Murphy
2018-01-28 22:39                           ` Tomasz Pala
2018-01-29  0:00                             ` Chris Murphy
2018-01-29  8:54                               ` Tomasz Pala
2018-01-29 11:24                                 ` Adam Borowski
2018-01-29 13:05                                   ` Austin S. Hemmelgarn
2018-01-30 13:46                                     ` Tomasz Pala
2018-01-30 15:05                                       ` Austin S. Hemmelgarn
2018-01-30 16:07                                         ` Tomasz Pala
2018-01-29 17:58                                   ` Andrei Borzenkov
2018-01-29 19:00                                     ` Austin S. Hemmelgarn
2018-01-29 21:54                                       ` waxhead
2018-01-30 13:46                                         ` Austin S. Hemmelgarn
2018-01-30 19:50                                           ` Tomasz Pala
2018-01-30 20:40                                             ` Austin S. Hemmelgarn
2018-01-30 15:24                                       ` Tomasz Pala
2018-01-30 13:36                                   ` Tomasz Pala
2018-01-30  4:44                                 ` Chris Murphy
2018-01-30 15:40                                   ` Tomasz Pala
2018-01-28  8:06                       ` Andrei Borzenkov
2018-01-28 10:27                         ` Tomasz Pala
2018-01-28 15:57                         ` Duncan
2018-01-28 16:51                           ` Andrei Borzenkov
2018-01-28 20:28                         ` Chris Murphy
2018-01-28 23:13                           ` Tomasz Pala
2018-01-27 21:12                     ` Chris Murphy
2018-01-28  0:16                       ` Tomasz Pala
2018-01-27 22:42                     ` Tomasz Pala
2018-01-29 13:42                       ` Austin S. Hemmelgarn
2018-01-30 15:09                         ` Tomasz Pala
2018-01-30 16:22                           ` Tomasz Pala
2018-01-30 16:30                           ` Austin S. Hemmelgarn
2018-01-30 19:24                             ` Tomasz Pala
2018-01-30 19:40                             ` Tomasz Pala
2018-01-27 20:57                   ` Chris Murphy
2018-01-28  0:00                     ` Tomasz Pala
2018-01-28 10:43                       ` Tomasz Pala [this message]
2018-01-26 21:54 ` Chris Murphy
2018-01-26 22:03   ` Christophe Yayon

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