linux-kernel - Re: [PATCH RT 1/2 v2] dm-snapshot: fix crash with the realtime kernel

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Date:   Tue, 19 Nov 2019 09:48:39 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Mikulas Patocka <mpatocka@...hat.com>
Cc:     Mike Snitzer <msnitzer@...hat.com>,
        Nikos Tsironis <ntsironis@...ikto.com>,
        Scott Wood <swood@...hat.com>,
        Ilias Tsitsimpis <iliastsi@...ikto.com>, dm-devel@...hat.com,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Daniel Wagner <dwagner@...e.de>,
        linux-rt-users@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH RT 1/2 v2] dm-snapshot: fix crash with the realtime kernel

On 2019-11-12 11:09:51 [-0500], Mikulas Patocka wrote:
> Snapshot doesn't work with realtime kernels since the commit f79ae415b64c.
> hlist_bl is implemented as a raw spinlock and the code takes two non-raw
> spinlocks while holding hlist_bl (non-raw spinlocks are blocking mutexes
> in the realtime kernel).

this series is still on the list of things for me to look at…

Sebastian