linux-kernel - Re: 5.0-rc kernel hangs on early boot

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Message-ID: <20190213112938.GP9565@techsingularity.net>
Date:   Wed, 13 Feb 2019 11:29:38 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Will Deacon <will.deacon@....com>
Cc:     Yury Norov <yury.norov@...il.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        David Rientjes <rientjes@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Zi Yan <zi.yan@...rutgers.edu>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: Re: 5.0-rc kernel hangs on early boot

On Wed, Feb 13, 2019 at 11:25:21AM +0000, Will Deacon wrote:
> > Thanks Will.
> > 
> > While I agree that going OOM early is a problem and would explain why
> > the boosting logic was hit at all, it's still the case that the boosting
> > should not divide by zero. Even if the booting is broken due to a lack
> > of memory, I'd still not prefer to crash due to 1c30844d2dfe272d58c.
> 
> Yup, sorry, our previous mails crossed paths. Your patch looks sensible in
> its own right, I'm just left wondering why we're OOM so early during boot!
> 

I completely agree that it's worth pinning down both issues.

-- 
Mel Gorman
SUSE Labs