linux-kernel - Re: [LKP] dad4f140ed [ 7.709376] WARNING:suspicious_RCU

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Message-ID: <20181119143918.GB394@bombadil.infradead.org>
Date:   Mon, 19 Nov 2018 06:39:18 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     kernel test robot <rong.a.chen@...el.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-doc@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-input@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org,
        LKP <lkp@...org>
Subject: Re: [LKP] dad4f140ed [ 7.709376] WARNING:suspicious_RCU_usage

On Sun, Nov 18, 2018 at 05:19:04PM -0800, Matthew Wilcox wrote:
> On Mon, Nov 19, 2018 at 09:08:20AM +0800, kernel test robot wrote:
> > Greetings,
> > 
> > 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> Umm.  I don't see a 'suspicious RCU usage' message in here.  I see a
> lot of vmalloc warnings ... ?

Never mind, the RCU warnings were in one of the attached dmesg files.
I found the problem; it's in the test-suite and not something that could
lead to any real problems today.

Thanks for the report!