linux-kernel - Re: [RFC 4/5] ext4: add fs freezing support on suspend/hibernation

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Message-ID: <1507130705.3583.14.camel@wdc.com>
Date:   Wed, 4 Oct 2017 15:25:07 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>,
        "ONeukum@...e.com" <ONeukum@...e.com>,
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Subject: Re: [RFC 4/5] ext4: add fs freezing support on suspend/hibernation

On Wed, 2017-10-04 at 18:05 +1100, Dave Chinner wrote:
> Basically, before thawing filesystems the rest of the kernel
> infrastructure needs to have been restarted. i.e. the order
> needs to be:
> 
> freeze userspace
> freeze filesystems
> freeze kernel threads
> freeze workqueues
> 
> thaw workqueues
> thaw kernel threads
> thaw filesystems
> thaw userspace
> 
> and it should end up that way.

Does this order support filesystems that have been implemented in user space,
e.g. filesystems based on FUSE?

Thanks,

Bart.