From: "Holger Hoffstätte" <holger.hoffstaette@googlemail.com>
To: ceph-devel@vger.kernel.org
Subject: Re: Suspend and the ceph clients
Date: Thu, 15 May 2014 08:13:59 +0000 (UTC) [thread overview]
Message-ID: <pan.2014.05.15.08.13.59@googlemail.com> (raw)
In-Reply-To: CAPYLRzhr7XA9sBArqe=5bPaXd3XPwgVGo_QOM024-J_ovh93BA@mail.gmail.com
On Wed, 14 May 2014 15:07:44 -0700, Gregory Farnum wrote:
> [..]
> Unfortunately, I don't know anything about Linux's suspend
> functionality or APIs, and my weak attempts at googling and grepping
> aren't turning anything up. So a question to everybody:
>
> 2) What notifications does Linux send, and what filesystem mechanisms
> does it invoke, when it is suspending?
Is this what you're looking for?
https://www.kernel.org/doc/Documentation/power/freezing-of-tasks.txt
User space is usually controlled by ("legacy") pm-utils, which simply
executes a bunch of scripts (packaged and user provided) in various
stages. It works reasonably well but is of course fragile - typical
scripted duct tape.
systemd has its own (IMHO much less fragile) way of doing things:
http://www.freedesktop.org/software/systemd/man/systemd-sleep.conf.html
Hope this helps.
-h
next prev parent reply other threads:[~2014-05-15 8:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 22:07 Suspend and the ceph clients Gregory Farnum
2014-05-15 8:13 ` Holger Hoffstätte [this message]
2014-05-15 8:28 ` Holger Hoffstätte
2014-05-15 14:29 ` Sage Weil
2014-05-15 22:19 ` Gregory Farnum
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