linux-kernel - Re: KASLR causes intermittent boot failures on some systems

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Message-ID: <x49tw5t6b57.fsf@segfault.boston.devel.redhat.com>
Date:   Wed, 12 Apr 2017 08:52:36 -0400
From:   Jeff Moyer <jmoyer@...hat.com>
To:     Dave Young <dyoung@...hat.com>
Cc:     thgarnie@...gle.com, mingo@...nel.org, bhe@...hat.com,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, kexec@...ts.infradead.org
Subject: Re: KASLR causes intermittent boot failures on some systems

Dave Young <dyoung@...hat.com> writes:

> On 04/12/17 at 04:24pm, Dave Young wrote:
>> I did some tests about emulated pmem via memmap=, kdump kernel hangs or
>> just reboots early during compressing kernel, no clue how to handle it.
>> Since for kdump kernel kaslr is pointless a workaround is use "nokaslr"
>> 
>> In Fedora or RHEL, just add "nokaslr" in KDUMP_COMMANDLINE_APPEND
>> in /etc/sysconfig/kdump 
>> 
>> Can you try if this works?
>
> Oops, your problem is normal boot instead of kdump so this is two
> different problems. Seems we have not met your bug yet..

Correct.

-Jeff