linux-kernel - Re: [PATCH 00/28] Optimize IRQ usage checks and other small bits

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Message-ID: <20190425185641.GT12232@hirez.programming.kicks-ass.net>
Date:   Thu, 25 Apr 2019 20:56:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Yuyang Du <duyuyang@...il.com>
Cc:     will.deacon@....com, mingo@...nel.org, bvanassche@....org,
        ming.lei@...hat.com, frederic@...nel.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/28] Optimize IRQ usage checks and other small bits

On Wed, Apr 24, 2019 at 06:19:06PM +0800, Yuyang Du wrote:
> Yuyang Du (28):
>   locking/lockdep: Change all print_*() return type to void
>   locking/lockdep: Add description and explanation in lockdep design doc
>   locking/lockdep: Adjust lock usage bit character checks
>   locking/lockdep: Remove useless conditional macro
>   locking/lockdep: Print the right depth for chain key colission
>   locking/lockdep: Update obsolete struct field description
>   locking/lockdep: Use lockdep_init_task for task initiation
>     consistently
>   locking/lockdep: Define INITIAL_CHAIN_KEY for chain keys to start with
>   locking/lockdep: Change the range of class_idx in held_lock struct
>   locking/lockdep: Remove unused argument in validate_chain() and
>     check_deadlock()
>   locking/lockdep: Update comment
>   locking/lockdep: Change type of the element field in circular_queue
>   locking/lockdep: Change the return type of __cq_dequeue()
>   locking/lockdep: Avoid constant checks in __bfs by using offset
>     reference
>   locking/lockdep: Update comments on dependency search
>   locking/lockdep: Add explanation to lock usage rules in lockdep design
>     doc
>   locking/lockdep: Remove redundant argument in check_deadlock
>   locking/lockdep: Remove unused argument in __lock_release

Those look really good (but don't readily apply to tip/locking/core) now
let me try and look at the real changes..

>   locking/lockdep: Optimize irq usage check when marking lock usage bit
>   locking/lockdep: Refactorize check_noncircular and check_redundant
>   locking/lockdep: Consolidate lock usage bit initialization
>   locking/lockdep: Adjust new bit cases in mark_lock
>   locking/lockdep: Update irqsafe lock bitmaps
>   locking/lockdep: Remove !dir in lock irq usage check
>   locking/lockdep: Implement new IRQ usage checking algorithm
>   locking/lockdep: Remove __bfs
>   locking/lockdep: Remove locks_before
>   locking/lockdep: Reduce lock_list_entries by half