netdev - Re: [PATCH net] af_unix: don't poll dead peers

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Message-ID: <CA+rthh_B-eZ6xjW+ZmcUuHjZy-Mw4v6NUPypWLn2W9nfjyOZ7Q@mail.gmail.com>
Date:	Wed, 4 Mar 2015 22:26:12 +0100
From:	Mathias Krause <minipli@...glemail.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Olivier Mauras <olivier@...ras.ch>,
	PaX Team <pageexec@...email.hu>
Subject: Re: [PATCH net] af_unix: don't poll dead peers

[ Removed Rainer from the Cc list, his address is bouncing. ]

On 4 March 2015 at 22:02, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Wed, 2015-03-04 at 21:39 +0100, Mathias Krause wrote:
>> On 4 March 2015 at 21:21, Eric Dumazet <eric.dumazet@...il.com> wrote:
>> >
>> > Using locks in _poll() is going to be tremendously expensive for some
>> > applications still using poll() or select() ?
>>
>> I've no idea but we're already taking this very lock in the
>> unix_peer_get() call a few lines above.
>
> This is not the same lock.
>
> other != sk

True. So, do you propose to not take the lock at all?
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