linux-kernel - Re: [RFC v2 83/83] Sysfs support.

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Message-ID: <CAD4Szjsg5_-Jy=1RQMFHHwYA9-uHu4SSDLYF8Q-GtcTWOAx3GA@mail.gmail.com>
Date:   Thu, 22 Mar 2018 17:31:13 -0700
From:   Andiry Xu <jix024@....ucsd.edu>
To:     dsterba@...e.cz, Andiry Xu <jix024@....ucsd.edu>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        Dan Williams <dan.j.williams@...el.com>,
        "Rudoff, Andy" <andy.rudoff@...el.com>, coughlan@...hat.com,
        Steven Swanson <swanson@...ucsd.edu>,
        Dave Chinner <david@...morbit.com>, Jan Kara <jack@...e.com>,
        swhiteho@...hat.com, miklos@...redi.hu,
        Jian Xu <andiry.xu@...il.com>, Andiry Xu <jix024@...ucsd.edu>
Subject: Re: [RFC v2 83/83] Sysfs support.

On Thu, Mar 22, 2018 at 8:00 AM, David Sterba <dsterba@...e.cz> wrote:
> On Sat, Mar 10, 2018 at 10:19:04AM -0800, Andiry Xu wrote:
>> From: Andiry Xu <jix024@...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.

Thanks. I will try to switch to sysfs.

Thanks,
Andiry