linux-kernel - Re: 9p fs-cache tests/benchmark (was: 9p fscache Duplicate cookie detected)

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Date:   Mon, 11 Apr 2022 08:59:32 +0100
From:   David Howells <dhowells@...hat.com>
To:     asmadeus@...ewreck.org
Cc:     dhowells@...hat.com,
        Christian Schoenebeck <linux_oss@...debyte.com>,
        David Kahurani <k.kahurani@...il.com>, davem@...emloft.net,
        ericvh@...il.com, kuba@...nel.org, linux-kernel@...r.kernel.org,
        lucho@...kov.net, netdev@...r.kernel.org,
        v9fs-developer@...ts.sourceforge.net, Greg Kurz <groug@...d.org>
Subject: Re: 9p fs-cache tests/benchmark (was: 9p fscache Duplicate cookie detected)

asmadeus@...ewreck.org wrote:

> I see fscache also uses the qid version as 'auxilliary data', but I'm
> not sure what this is used for -- if it's a data version like thing then
> it will also at least invalidate the cache content all the time.

I should really have renamed "auxiliary data" to "coherency data".  It's used
by direct comparison when fscache binds a cookie to a backing cache object to
work out if the content of the backing object is still valid.

David