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

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Date:   Sun, 18 Nov 2018 17:19:04 -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 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 ... ?

> [    7.699777] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6000c0(GFP_KERNEL), nodemask=(null)
> [    7.724561] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6000c0(GFP_KERNEL), nodemask=(null)
> [    7.737925] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
> [    7.750283] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
> [    7.777903] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6000c0(GFP_KERNEL), nodemask=(null)
> [    7.787175] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6000c0(GFP_KERNEL), nodemask=(null)
> [    7.796181] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
> [    7.804841] swapper: vmalloc: allocation failure: 18446744073709551615 bytes, mode:0x6080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)