linux-kernel - Re: [PATCH RFC 5/6] btrfs: sysfs: Add directory for read policies

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Date:   Mon, 15 Feb 2021 14:35:35 +0000
From:   Michal Rostecki <mrostecki@...e.de>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>,
        "open list:BTRFS FILE SYSTEM" <linux-btrfs@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Michal Rostecki <mrostecki@...e.com>
Subject: Re: [PATCH RFC 5/6] btrfs: sysfs: Add directory for read policies

On Sat, Feb 13, 2021 at 11:19:28AM +0100, Greg KH wrote:
> On Tue, Feb 09, 2021 at 09:30:39PM +0100, Michal Rostecki wrote:
> > From: Michal Rostecki <mrostecki@...e.com>
> > 
> > Before this change, raid1 read policy could be selected by using the
> > /sys/fs/btrfs/[fsid]/read_policy file.
> > 
> > Change it to /sys/fs/btrfs/[fsid]/read_policies/policy.
> > 
> > The motivation behing creating the read_policies directory is that the
> > next changes and new read policies are going to intruduce settings
> > specific to read policies.
> 
> No Documentation/ABI/ update for this change?
> 

Good point. As far as I see, we have no btrfs-related file there. I will
add it to Documentation/ABI/testing in v2.

I guess we also need to document all the options from btrfs that are
unaffected by this particular patchset? Would it make sense to cover
them in a separate patch?