linux-kernel - Re: [RFC 2/5] fs: freeze on suspend and thaw on resume

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Date:   Tue, 3 Oct 2017 20:02:22 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "pavel@....cz" <pavel@....cz>,
        "darrick.wong@...cle.com" <darrick.wong@...cle.com>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
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        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
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        "len.brown@...el.com" <len.brown@...el.com>,
        "tytso@....edu" <tytso@....edu>
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        "ONeukum@...e.com" <ONeukum@...e.com>,
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Subject: Re: [RFC 2/5] fs: freeze on suspend and thaw on resume

On Tue, 2017-10-03 at 11:53 -0700, Luis R. Rodriguez wrote:
> +static bool super_allows_freeze(struct super_block *sb)
> +{
> +	return !!(sb->s_type->fs_flags & FS_FREEZE_ON_SUSPEND);
> +}

A minor comment: if "!!" would be left out the compiler will perform the
conversion from int to bool implicitly so I propose to leave out the "!!"
and parentheses. Anyway, I agree with the approach of this patch and I think
that freezing filesystems before processes are frozen would be a big step
forward.

Bart.