linux-kernel - Re: [PATCH 1/3] 9p/net: implement asynchronous rpc

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Message-ID: <20181217110111.GB17466@nautica>
Date:   Mon, 17 Dec 2018 12:01:11 +0100
From:   Dominique Martinet <asmadeus@...ewreck.org>
To:     Tomas Bortoli <tomasbortoli@...il.com>
Cc:     v9fs-developer@...ts.sourceforge.net,
        Dominique Martinet <dominique.martinet@....fr>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH 1/3] 9p/net: implement asynchronous rpc

Tomas Bortoli wrote on Mon, Dec 17, 2018:
> sorry for the delay, I've been quite busy these days.

No problem.

> The patches looks good to me and should indeed speed up the code a bit.
> I quickly tested them against Syzkaller tuned for the 9p subsystem and
> everything seems fine.

Thanks, can I add your Reviewed-by on all three?

> And by the way, which refcount races?

There's a problem with trans_fd read_work and cancelled callback; I'm
not so sure about refcount but we can definitely get double list_del
as we're not checking the status. I think when we incorrectly remove
from the list we also mismanage the refcount, but honestly need to
test..

-- 
Dominique