From: Peter Hurley <peter@hurleysoftware.com>
To: Sasha Levin <sasha.levin@oracle.com>,
marcel@holtmann.org, gustavo@padovan.org,
johan.hedberg@gmail.com
Cc: davem@davemloft.net, linux-bluetooth@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Bluetooth: Revert "Bluetooth: rfcomm: Remove unnecessary krfcommd event"
Date: Wed, 29 Oct 2014 22:06:17 -0400 [thread overview]
Message-ID: <54519D19.6070205@hurleysoftware.com> (raw)
In-Reply-To: <1414632736-18782-1-git-send-email-sasha.levin@oracle.com>
Hi Sasha,
On 10/29/2014 09:32 PM, Sasha Levin wrote:
> This reverts commit e5842cdb0f4f2c68f6acd39e286e5d10d8c073e8.
>
> We can't call rfcomm_process_sessions() while our task state is not
> TASK_RUNNING since rfcomm_process_sessions() tries to lock mutexes
> and sleep. The scheduler even complains about it:
>
> [ 21.683959] WARNING: CPU: 13 PID: 8165 at kernel/sched/core.c:7305 __might_sleep+0xe5/0x1b0()
> [ 21.683962] do not call blocking ops when !TASK_RUNNING; state=1 set at rfcomm_run (net/bluetooth/rfcomm/core.c:2096)
This problem is in-process with Peter Z and Oleg and a new api
for handling nested sleeps.
The thread is here
http://www.gossamer-threads.com/lists/linux/kernel/2019181?do=post_view_threaded
and the reminder thread here
https://lkml.org/lkml/2014/10/27/343
Regards,
Peter Hurley
prev parent reply other threads:[~2014-10-30 2:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-30 1:32 [PATCH] Bluetooth: Revert "Bluetooth: rfcomm: Remove unnecessary krfcommd event" Sasha Levin
2014-10-30 2:06 ` Peter Hurley [this message]
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