linux-kernel - Re: [PATCH v3 bpf] bpf: introduce BPF_JIT_ALWAYS

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Date:   Mon, 29 Jan 2018 16:36:35 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Alexei Starovoitov <ast@...nel.org>, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>
Subject: Re: [PATCH v3 bpf] bpf: introduce BPF_JIT_ALWAYS_ON config

On 01/29/2018 12:40 AM, Daniel Borkmann wrote:
> On 01/28/2018 03:45 PM, Greg KH wrote:
>> On Wed, Jan 24, 2018 at 11:10:50AM +0100, Daniel Borkmann wrote:
>>> On 01/24/2018 11:07 AM, David Woodhouse wrote:
>>>> On Tue, 2018-01-09 at 22:39 +0100, Daniel Borkmann wrote:
>>>>> On 01/09/2018 07:04 PM, Alexei Starovoitov wrote:
[...]
>>>>> Applied to bpf tree, thanks Alexei!
>>>>
>>>> For stable too?
>>>
>>> Yes, this will go into stable as well; batch of backports will come Thurs/Fri.
>>
>> Any word on these?  Worse case, a simple list of git commit ids to
>> backport is all I need.
> 
> Sorry for the delay! There are various conflicts all over the place, so I had
> to backport manually. I just flushed out tested 4.14 batch, I'll see to get 4.9
> out hopefully tonight as well, and the rest for 4.4 on Mon.

While 4.14 and 4.9 BPF backports are tested and out since yesterday, and I
saw Greg queued them up (thanks!), it looks like plain 4.4.113 doesn't even
boot on my machine. While I can shortly see the kernel log, my screen turns
black shortly thereafter and nothing reacts anymore. No such problems with
4.9 and 4.14 stables seen. (using x86_64, i7-6600U) Is this a known issue?

Thanks,
Daniel