linux-kernel - Re: arm64: perf test 26 rpi4 oops

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Message-ID: <20230801072732.GA25854@willie-the-truck>
Date:   Tue, 1 Aug 2023 08:27:33 +0100
From:   Will Deacon <will@...nel.org>
To:     Mike Galbraith <efault@....de>
Cc:     Lorenzo Stoakes <lstoakes@...il.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        wangkefeng.wang@...wei.com, catalin.marinas@....com,
        ardb@...nel.org
Subject: Re: arm64: perf test 26 rpi4 oops

On Tue, Aug 01, 2023 at 06:34:15AM +0200, Mike Galbraith wrote:
> On Tue, 2023-08-01 at 01:48 +0200, Mike Galbraith wrote:
> >
> > root@...4:~# dmesg|tail -2
> > [  979.003019] __vm_enough_memory: pid: 12439, comm: objdump, not enough memory for the allocation
> > [  979.003080] __vm_enough_memory: pid: 12439, comm: objdump, not enough memory for the allocation
> 
> Ancient bug droppings are due to VMALLOC_END-VMALLOC_START=265885319168.

FWIW, I see the same thing on my x86 laptop. I'm guessing objdump tries
to read all of the vmalloc space into memory, which is going to end
pretty badly!

Will