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From: Sebastian Reichel <sre@kernel.org>
To: Valentin Rothberg <Valentin.Rothberg@lip6.fr>
Cc: dbaryshkov@gmail.com, dwmw2@infradead.org,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ab8500_fg.c: only request threaded IRQs when necessary
Date: Sat, 7 Mar 2015 20:47:04 +0100	[thread overview]
Message-ID: <20150307194704.GD5233@earth> (raw)
In-Reply-To: <1424104368-11202-1-git-send-email-Valentin.Rothberg@lip6.fr>

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Hi Valentin,

On Mon, Feb 16, 2015 at 05:32:48PM +0100, Valentin Rothberg wrote:
> All 5 IRQ handlers of the driver are requested as threaded interrupt
> handlers.  However, only 1 handler can block.  The remaining 4 handlers
> defer the actual handling to a workqueue.  Hence, 4 of 5 IRQ handlers
> have a considerable overhead, since they are executed in a kernel thread
> to schedule another kernel thread (workqueue).
> 
> This change splits up the 5 interrupt handlers into top halves (_th) and
> bottom halves (_bh) and resolves the aforementioned overhead by only
> requesting threaded interrupts (i.e., bottom halves) when necessary.
> 
> Signed-off-by: Valentin Rothberg <Valentin.Rothberg@lip6.fr>

Thanks, queued:

http://git.infradead.org/battery-2.6.git/commit/02232be7a2bf6e2dd5e4a6c3a81470a09ecc7fdd

-- Sebastian

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      reply	other threads:[~2015-03-07 19:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-16 16:32 [PATCH] ab8500_fg.c: only request threaded IRQs when necessary Valentin Rothberg
2015-03-07 19:47 ` Sebastian Reichel [this message]

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