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From: David Miller <davem@davemloft.net>
To: sunilmut@microsoft.com
Cc: stefanha@redhat.com, kvm@vger.kernel.org,
	netdev@vger.kernel.org, decui@microsoft.com
Subject: Re: [PATCH net-next] vsock: correct removal of socket from the list
Date: Fri, 14 Jun 2019 19:20:38 -0700 (PDT)
Message-ID: <20190614.192038.685198515789181601.davem@davemloft.net> (raw)
In-Reply-To: <MW2PR2101MB11162BBAEC52B232A7B1EFAFC0EF0@MW2PR2101MB1116.namprd21.prod.outlook.com>

From: Sunil Muthuswamy <sunilmut@microsoft.com>
Date: Thu, 13 Jun 2019 03:52:27 +0000

> The current vsock code for removal of socket from the list is both
> subject to race and inefficient. It takes the lock, checks whether
> the socket is in the list, drops the lock and if the socket was on the
> list, deletes it from the list. This is subject to race because as soon
> as the lock is dropped once it is checked for presence, that condition
> cannot be relied upon for any decision. It is also inefficient because
> if the socket is present in the list, it takes the lock twice.
> Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>


      parent reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-13  3:52 Sunil Muthuswamy
2019-06-13 14:47 ` Stefan Hajnoczi
2019-06-15  2:20 ` David Miller [this message]

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