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From: Dipankar Sarma <dipankar@in.ibm.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: paulmck@linux.vnet.ibm.com,
	Arjan van de Ven <arjan@infradead.org>,
	linux-input@vger.kernel.org, dmitry.torokhov@gmail.com,
	linux-kernel@vger.kernel.org
Subject: Re: Question about usage of RCU in the input layer
Date: Fri, 20 Mar 2009 11:31:28 +0530	[thread overview]
Message-ID: <20090320060128.GC6167@in.ibm.com> (raw)
In-Reply-To: <49C3296B.1020209@cosmosbay.com>

On Fri, Mar 20, 2009 at 06:28:11AM +0100, Eric Dumazet wrote:
> Paul E. McKenney a écrit :
> Hmm... point is to make linux boot as fast as possible, so ...
> 
> Use a special variant of udelay() in offending drivers that make appropriate
> RCU call to increment quiescent state ?

It may not be safe to do this it is in a RCU read-side critical section.

Thanks
Dipankar
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WARNING: multiple messages have this Message-ID (diff)
From: Dipankar Sarma <dipankar@in.ibm.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: paulmck@linux.vnet.ibm.com,
	Arjan van de Ven <arjan@infradead.org>,
	linux-input@vger.kernel.org, dmitry.torokhov@gmail.com,
	linux-kernel@vger.kernel.org
Subject: Re: Question about usage of RCU in the input layer
Date: Fri, 20 Mar 2009 11:31:28 +0530	[thread overview]
Message-ID: <20090320060128.GC6167@in.ibm.com> (raw)
In-Reply-To: <49C3296B.1020209@cosmosbay.com>

On Fri, Mar 20, 2009 at 06:28:11AM +0100, Eric Dumazet wrote:
> Paul E. McKenney a écrit :
> Hmm... point is to make linux boot as fast as possible, so ...
> 
> Use a special variant of udelay() in offending drivers that make appropriate
> RCU call to increment quiescent state ?

It may not be safe to do this it is in a RCU read-side critical section.

Thanks
Dipankar

  reply	other threads:[~2009-03-20  6:01 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-19  4:58 Question about usage of RCU in the input layer Arjan van de Ven
2009-03-19  7:23 ` Dmitry Torokhov
2009-03-19 14:02   ` Arjan van de Ven
2009-03-19  8:56 ` Dipankar Sarma
2009-03-19 14:18   ` Arjan van de Ven
2009-03-20  2:07     ` Paul E. McKenney
2009-03-20  3:20       ` Arjan van de Ven
2009-03-20  4:45         ` Paul E. McKenney
2009-03-20  5:28           ` Eric Dumazet
2009-03-20  6:01             ` Dipankar Sarma [this message]
2009-03-20  6:01               ` Dipankar Sarma
2009-03-20  6:35               ` Eric Dumazet
2009-03-20  6:35                 ` Eric Dumazet
2009-03-20 13:50           ` Arjan van de Ven
2009-03-20 14:31             ` Paul E. McKenney
2009-03-20 18:13               ` Arjan van de Ven
2009-03-21  1:27                 ` Paul E. McKenney
2009-03-21  4:58                   ` Arjan van de Ven
2009-03-21 18:58                     ` Paul E. McKenney
2009-03-21 19:51                   ` Arjan van de Ven
2009-03-21 20:26                     ` Eric Dumazet
2009-03-21 20:26                       ` Eric Dumazet
2009-03-21 21:07                       ` Paul E. McKenney
2009-03-21 21:07                         ` Paul E. McKenney
2009-03-22  3:40                         ` Arjan van de Ven
2009-03-22  3:40                           ` Arjan van de Ven
2009-03-22  4:38                           ` Paul E. McKenney
2009-03-22  4:38                             ` Paul E. McKenney
2009-03-22  4:51                             ` Arjan van de Ven
2009-03-22  4:51                               ` Arjan van de Ven
2009-03-22  5:18                               ` Paul E. McKenney
2009-03-22  5:53                                 ` Arjan van de Ven
2009-03-22 16:53                                   ` Paul E. McKenney
2009-03-22 19:46                                     ` Arjan van de Ven
2009-03-22 20:52                                       ` Paul E. McKenney
2009-03-22 22:44                                         ` Arjan van de Ven
2009-03-22 23:03                                           ` Paul E. McKenney
2009-03-22 23:16                                             ` Arjan van de Ven
2009-03-23  1:27                                               ` Paul E. McKenney
2009-04-03  1:27                                                 ` Paul E. McKenney
2009-03-21 21:13                       ` Arjan van de Ven
2009-03-20 22:21               ` Paul E. McKenney
2009-03-21  5:46         ` Dmitry Torokhov
2009-03-21  9:13           ` Eric Dumazet
2009-03-21  9:13             ` Eric Dumazet
2009-03-21 18:58             ` Paul E. McKenney
2009-03-21 18:58               ` Paul E. McKenney

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