linux-kernel - Re: [REGRESSION] Null pointer dereference while shrinking zswap

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Message-ID: <20240417150810.GA7636@redhat.com>
Date: Wed, 17 Apr 2024 16:08:10 +0100
From: "Richard W.M. Jones" <rjones@...hat.com>
To: Johannes Weiner <hannes@...xchg.org>
Cc: Chengming Zhou <chengming.zhou@...ux.dev>,
	Nhat Pham <nphamcs@...il.com>,
	Christian Heusel <christian@...sel.eu>,
	Seth Jennings <sjenning@...hat.com>,
	Dan Streetman <ddstreet@...e.org>,
	Vitaly Wool <vitaly.wool@...sulko.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, David Runge <dave@...epmap.de>,
	Mark W <instruform@...il.com>, regressions@...ts.linux.dev,
	Yosry Ahmed <yosryahmed@...gle.com>
Subject: Re: [REGRESSION] Null pointer dereference while shrinking zswap

On Wed, Apr 17, 2024 at 10:33:24AM -0400, Johannes Weiner wrote:
> I could reproduce the NULL crash locally with cgroup_disable=memory,
> the shrinker enabled, and echo 3 >/proc/sys/vm/drop_caches.

Can confirm that libguestfs uses cgroup_disable=memory for its
appliance (as it saves some RAM and we don't need cgroups).

Rich.

-- 
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