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Date:   Wed, 30 Nov 2022 12:48:35 +0100
From:   Guillaume Nault <gnault@...hat.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Benjamin Coddington <bcodding@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Philipp Reisner <philipp.reisner@...bit.com>,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>, Jens Axboe <axboe@...nel.dk>,
        Josef Bacik <josef@...icpanda.com>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Lee Duncan <lduncan@...e.com>, Chris Leech <cleech@...hat.com>,
        Mike Christie <michael.christie@...cle.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Steve French <sfrench@...ba.org>,
        Christine Caulfield <ccaulfie@...hat.com>,
        David Teigland <teigland@...hat.com>,
        Mark Fasheh <mark@...heh.com>,
        Joel Becker <jlbec@...lplan.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>,
        Eric Van Hensbergen <ericvh@...il.com>,
        Latchesar Ionkov <lucho@...kov.net>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Ilya Dryomov <idryomov@...il.com>,
        Xiubo Li <xiubli@...hat.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        Jeff Layton <jlayton@...nel.org>, drbd-dev@...ts.linbit.com,
        linux-block@...r.kernel.org, nbd@...er.debian.org,
        linux-nvme@...ts.infradead.org, open-iscsi@...glegroups.com,
        linux-scsi@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-afs@...ts.infradead.org, linux-cifs@...r.kernel.org,
        samba-technical@...ts.samba.org, cluster-devel@...hat.com,
        ocfs2-devel@....oracle.com, v9fs-developer@...ts.sourceforge.net,
        ceph-devel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: Re: [PATCH v1 2/3] Treewide: Stop corrupting socket's task_frag

On Tue, Nov 29, 2022 at 03:02:42PM +0100, Christoph Hellwig wrote:
> Hmm.  Having to set a flag to not accidentally corrupt per-task
> state seems a bit fragile.  Wouldn't it make sense to find a way to opt
> into the feature only for sockets created from the syscall layer?

That's something I originally considered. But, as far as I can see, nbd
needs this flag _and_ uses sockets created in user space. So it'd still
need to opt out manually.

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