From: Oleg Nesterov <oleg@redhat.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Peter Zijlstra <peterz@infradead.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Dave Jones <davej@redhat.com>
Subject: Re: [PATCH 0/5] lockdep: (Was: check && lockdep_no_validate)
Date: Mon, 20 Jan 2014 19:54:01 +0100 [thread overview]
Message-ID: <20140120185401.GA27651@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1401201328330.24630-100000@netrider.rowland.org>
On 01/20, Alan Stern wrote:
>
> On Mon, 20 Jan 2014, Oleg Nesterov wrote:
>
> > On 01/17, Alan Stern wrote:
> > >
> > > Also, take a look at commit 356c05d58af0. It's a similar situation
> > > (not exactly the same).
> >
> > At first glance, can't __ATTR_IGNORE_LOCKDEP() use no_validate too ?
> > (ignoring the fact checkpatch.pl won't be happy). This can simplify
> > the code, it seems.
>
> Well, the macro itself doesn't specify the lockdep class. That happens
> implicitly in sysfs_get_active(), in the call to rwsem_acquire_read().
> However, it ought to be possible to change the code so that when
> ignore_lockdep(sd) returns nonzero, we end up using no_validate.
sysfs_dirent_init_lockdep() can check ->ignore_lockdep and do
lockdep_set_novalidate_class(). This way sysfs_ignore_lockdep() can
go away.
I guess we could even change __ATTR_IGNORE_LOCKDEP() to initialize
->key = __lockdep_no_validate__ and kill ->ignore_lockdep.
Oleg.
next prev parent reply other threads:[~2014-01-20 18:54 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-09 11:15 [RFC][PATCH] lockdep: Introduce wait-type checks Peter Zijlstra
2014-01-09 11:49 ` Peter Zijlstra
2014-01-09 16:31 ` Oleg Nesterov
2014-01-09 17:08 ` Peter Zijlstra
2014-01-09 17:54 ` check && lockdep_no_validate (Was: lockdep: Introduce wait-type checks) Oleg Nesterov
2014-01-12 20:58 ` Peter Zijlstra
2014-01-13 16:07 ` Oleg Nesterov
2014-01-16 17:43 ` Oleg Nesterov
2014-01-16 18:09 ` Peter Zijlstra
2014-01-16 20:26 ` Alan Stern
2014-01-17 16:31 ` Oleg Nesterov
2014-01-17 18:01 ` Alan Stern
2014-01-20 18:19 ` [PATCH 0/5] lockdep: (Was: check && lockdep_no_validate) Oleg Nesterov
2014-01-20 18:20 ` [PATCH 1/5] lockdep: make held_lock->check and "int check" argument bool Oleg Nesterov
2014-02-10 13:32 ` [tip:core/locking] lockdep: Make " tip-bot for Oleg Nesterov
2014-01-20 18:20 ` [PATCH 2/5] lockdep: don't create the wrong dependency on hlock->check == 0 Oleg Nesterov
2014-02-10 13:33 ` [tip:core/locking] lockdep: Don' t " tip-bot for Oleg Nesterov
2014-01-20 18:20 ` [PATCH 3/5] lockdep: change mark_held_locks() to check hlock->check instead of lockdep_no_validate Oleg Nesterov
2014-02-10 13:33 ` [tip:core/locking] lockdep: Change " tip-bot for Oleg Nesterov
2014-01-20 18:20 ` [PATCH 4/5] lockdep: change lockdep_set_novalidate_class() to use _and_name Oleg Nesterov
2014-02-10 13:33 ` [tip:core/locking] lockdep: Change " tip-bot for Oleg Nesterov
2014-01-20 18:20 ` [PATCH 5/5] lockdep: pack subclass/trylock/read/check into a single argument Oleg Nesterov
2014-01-21 14:10 ` Peter Zijlstra
2014-01-21 17:27 ` Oleg Nesterov
2014-01-21 17:35 ` Dave Jones
2014-01-21 18:43 ` Oleg Nesterov
2014-01-21 18:53 ` Steven Rostedt
2014-01-21 20:06 ` Oleg Nesterov
2014-01-21 19:39 ` uninline rcu_lock_acquire/etc ? Oleg Nesterov
2014-01-22 3:54 ` Paul E. McKenney
2014-01-22 18:31 ` Oleg Nesterov
2014-01-22 19:34 ` Paul E. McKenney
2014-01-22 19:39 ` Oleg Nesterov
2014-01-20 18:37 ` [PATCH 0/5] lockdep: (Was: check && lockdep_no_validate) Alan Stern
2014-01-20 18:54 ` Oleg Nesterov [this message]
2014-01-20 21:42 ` Alan Stern
2014-01-12 9:40 ` [RFC][PATCH] lockdep: Introduce wait-type checks Ingo Molnar
2014-01-12 17:45 ` [PATCH 0/1] lockdep: Kill held_lock->check and "int check" arg of __lock_acquire() Oleg Nesterov
2014-01-12 17:45 ` [PATCH 1/1] " Oleg Nesterov
2014-01-13 0:28 ` Dave Jones
2014-01-13 16:20 ` Oleg Nesterov
2014-01-13 17:06 ` Oleg Nesterov
2014-01-13 17:28 ` Peter Zijlstra
2014-01-13 18:52 ` Oleg Nesterov
2014-01-13 22:34 ` Paul E. McKenney
2014-01-12 20:00 ` [PATCH 0/1] " Peter Zijlstra
2014-01-13 18:35 ` Oleg Nesterov
2014-01-09 17:33 ` [RFC][PATCH] lockdep: Introduce wait-type checks Dave Jones
2014-01-09 22:12 ` Peter Zijlstra
2014-01-10 12:11 ` Peter Zijlstra
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