From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: Theodore Ts'o <tytso@mit.edu>,
"Jason A . Donenfeld " <Jason@zx2c4.com>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH 0/5] random: Add PREEMPT_RT support.
Date: Tue, 7 Dec 2021 13:17:32 +0100 [thread overview]
Message-ID: <20211207121737.2347312-1-bigeasy@linutronix.de> (raw)
The entropy_store::lock can not be acquired with disabled interrupts on
PREEMPT_RT because it is a sleeping lock. The lock is acquired from
hard-irq context while the primary interrupt handler is invoked.
The series restructures the code a little so the lock is only acquired
in process context on PREEMPT_RT while it remains as-is for non-RT.
The first two patches remove unused arguments from functions. The
following two reshuffle the code a little while the last one addresses
the PREEMPT_RT related issue.
Sebastian
next reply other threads:[~2021-12-07 12:17 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 12:17 Sebastian Andrzej Siewior [this message]
2021-12-07 12:17 ` [PATCH 1/5] random: Remove unused irq_flags argument from add_interrupt_randomness() Sebastian Andrzej Siewior
2021-12-07 12:44 ` Wei Liu
2021-12-07 17:35 ` Jason A. Donenfeld
2021-12-07 12:17 ` [PATCH 2/5] irq: Remove unsued flags argument from __handle_irq_event_percpu() Sebastian Andrzej Siewior
2021-12-07 17:41 ` Jason A. Donenfeld
2021-12-11 22:39 ` Thomas Gleixner
2021-12-12 21:13 ` Jason A. Donenfeld
2021-12-07 12:17 ` [PATCH 3/5] random: Split add_interrupt_randomness() Sebastian Andrzej Siewior
2021-12-07 12:17 ` [PATCH 4/5] random: Move the fast_pool reset into the caller Sebastian Andrzej Siewior
2021-12-07 12:17 ` [PATCH 5/5] random: Defer processing of randomness on PREEMPT_RT Sebastian Andrzej Siewior
2021-12-07 18:14 ` Jason A. Donenfeld
2021-12-07 20:10 ` Sebastian Andrzej Siewior
2021-12-13 15:16 ` Sebastian Andrzej Siewior
2021-12-17 2:23 ` Herbert Xu
2021-12-17 9:00 ` Sebastian Andrzej Siewior
2021-12-18 3:24 ` Herbert Xu
2021-12-19 9:48 ` Sebastian Andrzej Siewior
2021-12-20 2:56 ` Herbert Xu
2021-12-20 14:38 ` Jason A. Donenfeld
2022-01-12 17:49 ` Sebastian Andrzej Siewior
2022-01-30 22:55 ` Jason A. Donenfeld
2022-01-31 16:33 ` Sebastian Andrzej Siewior
2022-02-04 15:31 ` [PATCH RFC v1] random: do not take spinlocks in irq handler Jason A. Donenfeld
2022-02-04 15:58 ` Jason A. Donenfeld
2022-02-04 20:53 ` Sebastian Andrzej Siewior
2022-02-04 20:47 ` Sebastian Andrzej Siewior
2022-02-04 22:08 ` Jason A. Donenfeld
2022-02-04 23:09 ` [PATCH v2] random: defer fast pool mixing to worker Jason A. Donenfeld
2022-02-05 4:02 ` [PATCH RFC v1] random: do not take spinlocks in irq handler Sultan Alsawaf
2022-02-05 12:50 ` Jason A. Donenfeld
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