Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH 4.18 050/123] mm/tlb, x86/mm: Support invalidating TLB
 caches for RCU_TABLE_FREE
From:   Andre Tomt <andre@tomt.net>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Naresh Kamboju <naresh.kamboju@linaro.org>
Cc:     open list <linux-kernel@vger.kernel.org>,
        linux- stable <stable@vger.kernel.org>,
        Jann Horn <jannh@google.com>,
        "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Rik van Riel <riel@surriel.com>,
        Nicholas Piggin <npiggin@gmail.com>,
        David Miller <davem@davemloft.net>,
        Will Deacon <will.deacon@arm.com>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Michael Ellerman <mpe@ellerman.id.au>, stable@kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>
References: <20180903165719.499675257@linuxfoundation.org>
 <20180903165721.576888426@linuxfoundation.org>
 <CA+G9fYsyr_AxbmuWfD6svin4Cq_5QJOYvOW_ohnS7fUobRU7ZA@mail.gmail.com>
 <20180904052428.GA26045@kroah.com>
 <75d7b2f6-e057-5c76-0da0-2e76b54d10a5@tomt.net>
Message-ID: <4059f8e5-391c-5898-a6ce-8aa6ed887731@tomt.net>
Date:   Tue, 4 Sep 2018 10:06:32 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <75d7b2f6-e057-5c76-0da0-2e76b54d10a5@tomt.net>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 04. sep. 2018 08:10, Andre Tomt wrote:
> On 04. sep. 2018 07:24, Greg Kroah-Hartman wrote:
>>> Full test log link,
>>> https://lkft.validation.linaro.org/scheduler/job/404027#L4051
>>
>> Does Linus's tree also crash with this patch applied?  Being "bug
>> compatible" is good :)
>>
>> thanks,
>>
>> greg k-h
>>
> 
> I suspect it is because we're missing upstream commit 
> db7ddef301128dad394f1c0f77027f86ee9a4edb
> mm: move tlb_table_flush to tlb_flush_mmu_free
> 
> Have not tested.

Tested it now. Adding this commit to my local 4.18.6-rc1 based tree 
fixes the crashing on my systems.

On 4.18.6-rc1 they would fall over within seconds of getting to the 
login prompt.