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Date:   Wed, 27 May 2020 17:00:41 +0200
From:   Paolo Bonzini <>
To:     Andrew Lunn <>,
        Emanuele Giuseppe Esposito <>
Cc:     Jakub Kicinski <>,,
        Christian Borntraeger <>,
        Jim Mattson <>,
        Alexander Viro <>,
        Emanuele Giuseppe Esposito <>,
        David Rientjes <>,
        Jonathan Adams <>,,,,,,,,,
Subject: Re: [PATCH v3 0/7] Statsfs: a new ram-based file system for Linux
 kernel statistics

On 27/05/20 15:33, Andrew Lunn wrote:
>> I don't really know a lot about the networking subsystem, and as it was
>> pointed out in another email on patch 7 by Andrew, networking needs to
>> atomically gather and display statistics in order to make them consistent,
>> and currently this is not supported by stats_fs but could be added in
>> future.
> Do you have any idea how you will support atomic access? It does not
> seem easy to implement in a filesystem based model.

Hi Andrew,

there are plans to support binary access.  Emanuele and I don't really
have a plan for how to implement it, but there are developers from
Google that have ideas (because Google has a similar "metricfs" thing

I think atomic access would use some kind of "source_ops" struct
containing create_snapshot and release_snapshot function pointers.


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