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Date: Thu, 22 Mar 2018 16:00:37 +0100
From: David Sterba <dsterba@suse.cz>
Subject: Re: [RFC v2 83/83] Sysfs support.
Message-ID: <20180322150037.GD6955@twin.jikos.cz>
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To: Andiry Xu <jix024@eng.ucsd.edu>
Cc: coughlan@redhat.com, linux-nvdimm@lists.01.org, Andiry Xu <jix024@cs.ucsd.edu>, miklos@szeredi.hu, david@fromorbit.com, linux-kernel@vger.kernel.org, jack@suse.com, linux-fsdevel@vger.kernel.org, swanson@cs.ucsd.edu, swhiteho@redhat.com, andiry.xu@gmail.com
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On Sat, Mar 10, 2018 at 10:19:04AM -0800, Andiry Xu wrote:
> From: Andiry Xu <jix024@cs.ucsd.edu>
> 
> Sysfs support allows user to get/post information of running NOVA instance.
> After mount, NOVA creates four entries under proc directory
> /proc/fs/nova/pmem#/:
> 
> timing_stats	IO_stats	allocator	gc
> 
> Show NOVA file operation timing statistics:
> cat /proc/fs/NOVA/pmem#/timing_stats
> 
> Clear timing statistics:
> echo 1 > /proc/fs/NOVA/pmem#/timing_stats
> 
> Show NOVA I/O statistics:
> cat /proc/fs/NOVA/pmem#/IO_stats
> 
> Clear I/O statistics:
> echo 1 > /proc/fs/NOVA/pmem#/IO_stats
> 
> Show NOVA allocator information:
> cat /proc/fs/NOVA/pmem#/allocator
> 
> Manual garbage collection:
> echo #inode_number > /proc/fs/NOVA/pmem#/gc

IIRC no new entries should be added to /proc, /sys is supposed to be
used. I can't find it documented though, so you'd better check with
sysfs people.
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