linux-kernel - Re: scheduling while atomic in z3fold

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Message-ID: <20201130145229.mhbkrfuvyctniaxi@linutronix.de>
Date:   Mon, 30 Nov 2020 15:52:29 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Mike Galbraith <efault@....de>
Cc:     Oleksandr Natalenko <oleksandr@...alenko.name>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-rt-users@...r.kernel.org
Subject: Re: scheduling while atomic in z3fold

On 2020-11-30 15:42:46 [+0100], Mike Galbraith wrote:
> This explodes in write_unlock() as mine did.   Oleksandr's local_lock()
> variant explodes in the lock he added.  (ew, corruption)
> 
> I think I'll try a stable-rt tree.  This master tree _should_ be fine
> given it seems to work just peachy for everything else, but my box is
> the only one making boom... and also NOT making boom with the zbud
> compressor.  Hrmph.

How do you test this? I triggered a few oom-killer and I have here git
gc running for a few hours now… Everything is fine.

Sebastian