linux-kernel - Re: [GIT] Networking

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Message-ID: <AANLkTikLY1B3=C2TjAbYKVHbub-aPeG2heaUBWRUAg=R@mail.gmail.com>
Date:	Thu, 20 Jan 2011 14:21:43 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [GIT] Networking

On Thu, Jan 20, 2011 at 1:40 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> Then here ask for fd=3 both POLLIN and POLLOUT :
> kernel answers : OK for POLLOUT (not POLLIN), so previous poll() call
> was OK to be blocked after all...
>
> So I'm wondering if it could be a userland bug, that triggers with
> recent kernel changes.

As far as I can tell, that program isn't multi-threaded, and it should
not have returned to user land at all (no signal, and a restart). So I
think it's a kernel-only thing - there should have been nothing that
could have changed the poll list in user space. But I didn't really
check the threading status.

I'm trying to bisect it now to figure out more hints.

             Linus
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