linux-kernel - Re: [PATCH v2 1/5] 9p: Fix refcounting during full path walks for fid lookups

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Message-ID: <7291261.iO0hoOTYzs@silver>
Date:   Thu, 09 Jun 2022 14:44:04 +0200
From:   Christian Schoenebeck <linux_oss@...debyte.com>
To:     Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Tyler Hicks <tyhicks@...ux.microsoft.com>
Cc:     Jianyong Wu <jianyong.wu@....com>,
        v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] 9p: Fix refcounting during full path walks for fid lookups

On Dienstag, 7. Juni 2022 05:41:10 CEST Tyler Hicks wrote:
> On 2022-06-01 16:28:49, Christian Schoenebeck wrote:
> > On Dienstag, 31. Mai 2022 16:28:29 CEST Tyler Hicks wrote:
> > > On 2022-05-30 19:14:43, Christian Schoenebeck wrote:
> > > > On Freitag, 27. Mai 2022 01:59:59 CEST Tyler Hicks wrote:
> > > > > Decrement the refcount of the parent dentry's fid after walking
> > > > > each path component during a full path walk for a lookup. Failure to
> > > > > do
> > > > > so can lead to fids that are not clunked until the filesystem is
> > > > > 
> > > > > unmounted, as indicated by this warning:
> > > > >  9pnet: found fid 3 not clunked
> > > > 
> > > > That explains why I saw so many fids not being clunked with recent
> > > > Linux
> > > > kernel versions while doing some 9p protocol debugging with QEMU
> > > > recently.
[...]
> 9p maintainers, is there anything else that I can help with to get this
> bug fix reviewed/merged? Thanks!

Dominique is the only active 9p maintainer for a while and barely has time for 
9p anymore (hint: implied call for volunteers hidden in this sentence).

Dominique, do you have a time slice for this issue? I agree that it makes 
sense to bring this issue forward.

Best regards,
Christian Schoenebeck