From: Colin Leroy <colin@colino.net>
To: Matt Mackall <mpm@selenic.com>
Cc: Andi Kleen <ak@suse.de>, "David S. Miller" <davem@davemloft.net>,
Andrew Morton <akpm@osdl.org>,
netdev@oss.sgi.com
Subject: Re: [PATCH] Prevent netpoll hanging when link is down
Date: Mon, 11 Oct 2004 22:45:42 +0200 [thread overview]
Message-ID: <20041011224542.5bdc93aa@jack.colino.net> (raw)
In-Reply-To: <20041011165851.GN31237@waste.org>
On 11 Oct 2004 at 11h10, Matt Mackall wrote:
Hi,
> Ergh, you deleted the context. Again, imagine we're originally in
> ->poll() for _a non-netpoll-related reason_. In other words, the
> console sem is not taken, because we're just doing routine network
> I/O. While in poll(), we take a private driver lock. Then for whatever
> reason, we printk -> netconsole -> netpoll -> poll() again where we
> attempt to retake the private driver lock.
>
> > P.S.: I made the same mistake long ago, but akpm set me straight.
>
> I'm pretty sure this case is different.
I tried replacing spin_lock by spin_trylock in poll() and a few other
functions (and returning accordingly), but it didn't help. I'm beginning
to think I won't be able to debug this one! ;)
--
Colin
"When in doubt, do the right thing."
next prev parent reply other threads:[~2004-10-11 20:45 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20041006232544.53615761@jack.colino.net>
2004-10-06 21:43 ` [PATCH] Prevent netpoll hanging when link is down Matt Mackall
2004-10-07 5:53 ` Colin Leroy
2004-10-07 6:49 ` David S. Miller
2004-10-07 8:33 ` Colin Leroy
2004-10-07 8:45 ` Colin Leroy
2004-10-07 14:05 ` Colin Leroy
2004-10-07 18:28 ` David S. Miller
2004-10-07 18:41 ` Matt Mackall
2004-10-07 20:00 ` Colin Leroy
2004-10-07 18:43 ` Andi Kleen
2004-10-07 20:44 ` Colin Leroy
2004-10-07 21:45 ` Andi Kleen
2004-10-07 21:50 ` Matt Mackall
2004-10-07 22:07 ` David S. Miller
2004-10-07 23:43 ` Matt Mackall
2004-10-07 23:50 ` Andi Kleen
2004-10-08 6:46 ` Colin Leroy
2004-10-08 21:53 ` Matt Mackall
2004-10-08 7:06 ` Colin Leroy
2004-10-08 22:00 ` Matt Mackall
2004-10-08 22:18 ` Andrew Morton
2004-10-11 3:59 ` David S. Miller
2004-10-11 15:40 ` Andi Kleen
2004-10-11 16:22 ` Matt Mackall
2004-10-11 16:32 ` Andi Kleen
2004-10-11 16:36 ` Matt Mackall
2004-10-11 16:43 ` Andi Kleen
2004-10-11 16:58 ` Matt Mackall
2004-10-11 17:41 ` Andi Kleen
2004-10-11 20:45 ` Colin Leroy [this message]
[not found] ` <5cac192f0410181443303379e2@mail.gmail.com>
[not found] ` <5cac192f041018145824acce5a@mail.gmail.com>
[not found] ` <20041020161119.6e30efe5@pirandello>
[not found] ` <5cac192f0410200848179ccc81@mail.gmail.com>
2004-10-21 16:36 ` Colin Leroy
2004-10-24 15:22 ` Eric Lemoine
2004-10-07 22:08 ` David S. Miller
2004-10-08 6:54 ` Colin Leroy
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