From: Dmitry Osipenko <digetx@gmail.com>
To: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>,
"Liam Girdwood" <lgirdwood@gmail.com>,
"Mark Brown" <broonie@kernel.org>
Cc: linux-kernel@vger.kernel.org, Vladimir Zapolskiy <vz@mleia.com>
Subject: Re: [PATCH 1/7] regulator: push allocation in regulator_init_coupling() outside of lock
Date: Tue, 11 Aug 2020 19:27:43 +0300 [thread overview]
Message-ID: <b27219ff-6cd8-399b-5710-cb5c2d99b21f@gmail.com> (raw)
In-Reply-To: <0d61983a-ed11-e5c1-f2c8-954e5ae330f4@gmail.com>
11.08.2020 18:59, Dmitry Osipenko пишет:
> 11.08.2020 04:07, Michał Mirosław пишет:
>> Allocating memory with regulator_list_mutex held makes lockdep unhappy
>> when memory pressure makes the system do fs_reclaim on eg. eMMC using
>> a regulator. Push the lock inside regulator_init_coupling() after the
>> allocation.
> ...
>
> Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
>
On the other hand, couldn't it be better to just remove taking the
list_mutex from the regulator_lock_dependent()?
I think the list_mutex is only needed to protect from supply/couple
regulator being removed during of the locking process, but maybe this is
not something we should worry about?
next prev parent reply other threads:[~2020-08-11 16:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-11 1:07 [PATCH 0/7] regulator: fix deadlock vs memory reclaim Michał Mirosław
2020-08-11 1:07 ` [PATCH 1/7] regulator: push allocation in regulator_init_coupling() outside of lock Michał Mirosław
2020-08-11 15:59 ` Dmitry Osipenko
2020-08-11 16:27 ` Dmitry Osipenko [this message]
2020-08-11 17:20 ` Michał Mirosław
2020-08-11 21:02 ` Dmitry Osipenko
2020-08-11 1:07 ` [PATCH 2/7] regulator: push allocation in regulator_ena_gpio_request() out " Michał Mirosław
2020-08-11 1:07 ` [PATCH 3/7] regulator: push allocations in create_regulator() outside " Michał Mirosław
2020-08-11 1:07 ` [PATCH 4/7] regulator: push allocation in set_consumer_device_supply() out " Michał Mirosław
2020-08-11 5:23 ` kernel test robot
2020-08-11 17:28 ` Michał Mirosław
2020-08-11 1:07 ` [PATCH 5/7] regulator: plug of_node leak in regulator_register()'s error path Michał Mirosław
2020-08-11 6:15 ` Vladimir Zapolskiy
2020-08-11 1:07 ` [PATCH 6/7] regulator: cleanup regulator_ena_gpio_free() Michał Mirosław
2020-08-11 1:07 ` [PATCH 7/7] regulator: remove superfluous lock in regulator_resolve_coupling() Michał Mirosław
2020-08-11 15:56 ` Dmitry Osipenko
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