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From: Steffen Klassert <steffen.klassert@secunet.com>
To: Jonathan Corbet <corbet@lwn.net>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] Add a document for the padata interface
Date: Fri, 14 May 2010 12:58:59 +0200	[thread overview]
Message-ID: <20100514105859.GA2184@secunet.com> (raw)
In-Reply-To: <20100512142917.4287bf6e@bike.lwn.net>

On Wed, May 12, 2010 at 02:29:17PM -0600, Jonathan Corbet wrote:
> +
> +Each task submitted to padata_do_parallel() will, in turn, be passed to
> +exactly one call to the above-mentioned parallel() function, on one CPU, so
> +true parallelism is achieved by submitting multiple tasks.  The workqueue
> +is used to actually make these calls, so parallel() runs in process context
> +and is allowed to sleep.  

We disable the BHs before we call parallel(), so sleeping is not allowed.
This is necessary to keep up with the networking softirq if padata is used
for doing IPsec.

Everything else reads pretty good.

Thanks,

Steffen

  reply	other threads:[~2010-05-14 11:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-12 20:29 [PATCH] Add a document for the padata interface Jonathan Corbet
2010-05-14 10:58 ` Steffen Klassert [this message]
2010-05-14 15:20   ` Jonathan Corbet
2010-05-14 15:36     ` Steffen Klassert

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