linux-kernel - Re: call_rcu from trace

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Message-ID: <557FC14C.9080901@plumgrid.com>
Date:	Mon, 15 Jun 2015 23:25:16 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Wagner <daniel.wagner@...-carit.de>,
	paulmck@...ux.vnet.ibm.com
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: call_rcu from trace_preempt

On 6/15/15 11:06 PM, Daniel Wagner wrote:
>> with the above 'fix' the trace.patch is now passing.
> It still crashes for me with the original test program
>
> [  145.908013]  [<ffffffff810d1da1>] ? __rcu_reclaim+0x101/0x3d0
> [  145.908013]  [<ffffffff810d1ca0>] ? rcu_barrier_func+0x250/0x250
> [  145.908013]  [<ffffffff810abc03>] ? trace_hardirqs_on_caller+0xf3/0x240
> [  145.908013]  [<ffffffff810d9afa>] rcu_do_batch+0x2ea/0x6b0

yes. full bpf test still crashes.
That's why I said trace.patch is passing ;)
There is something else in there. One 'fix' at a time.
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