linux-kernel - Re: [PATCH] CIFS: Prevent error log on spurious oplock break

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Message-ID: <87h7lkve12.fsf@suse.com>
Date:   Tue, 09 Mar 2021 11:04:41 +0100
From:   Aurélien Aptel <aaptel@...e.com>
To:     ronnie sahlberg <ronniesahlberg@...il.com>,
        Shyam Prasad N <nspmangalore@...il.com>
Cc:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        CIFS <linux-cifs@...r.kernel.org>,
        samba-technical <samba-technical@...ts.samba.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Steve French <sfrench@...ba.org>, kernel@...s.com,
        Pavel Shilovsky <pshilov@...rosoft.com>
Subject: Re: [PATCH] CIFS: Prevent error log on spurious oplock break

ronnie sahlberg <ronniesahlberg@...il.com> writes:
> Some thoughts I and Stever brainstormed about could be to change the code in the
> demiltiplex thread where we currently dump the packets that were "invalid"
> to maybe:
> *  log once as VFS and then log any future ones as FYI
> * log once as VFS and then only make the others available via dynamic
> trace points
> * rate limit it so we only log it once every n minutes?  (this is overkill?)

My thoughts: these dumps have been very useful for us in the past, and
at least for SMB2, they indicate real bugs I think. I have a little
script to parse and decode them. So I'm in favor of keeping them in
SMB2+. For SMB1 I'm OK making them dynamicaly switch to FYI.

Cheers,
-- 
Aurélien Aptel / SUSE Labs Samba Team
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