linux-kernel - Re: Occasional hung with UM after enable VMAP

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Message-ID: <d80e4e760171de3813895e3cbfcadf96aa6c8fb6.camel@sipsolutions.net>
Date:   Tue, 04 Jan 2022 20:04:24 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Walter Lozano <walter.lozano@...labora.com>,
        linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Sjoerd Simons <sjoerd.simons@...labora.com>,
        ritesh sarraf <ritesh.sarraf@...labora.com>
Subject: Re: Occasional hung with UM after enable VMAP_STACK

On Tue, 2022-01-04 at 15:10 -0300, Walter Lozano wrote:
> Hi all,
> 
> I noticed that after "um: enable VMAP_STACK" [1] I experienced some 
> occasional hung in my Gitlab CI jobs that use user-mode-linux to build 
> distro images.
> 

Did you actually *enable* VMAP_STACK in the config as well? The commit
just makes it *possible* to enable it, you still have to set it
yourself. So you should be able to easily check with/without that
setting.

johannes