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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Vinod Koul <vinod.koul@intel.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
	sakato <ryusuke.sakato.bx@renesas.com>,
	OSD2 ML <osd2@lm.renesas.com>,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] dma: rcar-dmac: use list_add() on rcar_dmac_desc_put()
Date: Tue, 24 May 2016 12:50:28 +0300	[thread overview]
Message-ID: <2831766.dEtRrr4FvR@avalon> (raw)
In-Reply-To: <20160514075731.GA23734@localhost>

Hi Vinod,

On Saturday 14 May 2016 13:27:31 Vinod Koul wrote:
> On Fri, Apr 22, 2016 at 01:50:04AM +0000, Kuninori Morimoto wrote:
> > From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> > 
> > Current rcar_dmac_desc_put() is using list_add_tail() in order to
> > push used descriptor to list of free descriptors, and next DMA transfer
> > try to reuse it from this list. But because it is using *_tail(),
> > this reuse effect can't be obtained without using all of them.
> > For a longer-term solution, we should allocate hardware descriptors
> > using GFP_KERNEL instead of GFP_NOWAIT, but it is difficult today.
> > This patch uses list_add() instead of list_add_tail() for short-term
> > solution.
> 
> Applied, thanks

Thanks, but where did you apply it to ? I can't find it in your tree.

-- 
Regards,

Laurent Pinchart

  reply	other threads:[~2016-05-24  9:50 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <redmine.journal-676557.20160325074450.6aeff6eaa5fae69d@dm.renesas.com>
     [not found] ` <8760w7xq3n.wl%kuninori.morimoto.gx@renesas.com>
     [not found]   ` <874mbrxnft.wl%kuninori.morimoto.gx@renesas.com>
     [not found]     ` <1645988.6VIRltF7C5@avalon>
2016-04-22  1:50       ` [PATCH] dma: rcar-dmac: use list_add() on rcar_dmac_desc_put() Kuninori Morimoto
2016-05-02  9:37         ` Vinod Koul
2016-05-09 20:49           ` Laurent Pinchart
2016-05-11  3:28             ` Kuninori Morimoto
2016-05-14  8:11               ` Vinod Koul
2016-05-14  7:57         ` Vinod Koul
2016-05-24  9:50           ` Laurent Pinchart [this message]
2016-05-26 15:34             ` Vinod Koul
2016-05-30  0:34               ` Kuninori Morimoto
2016-05-30  0:41       ` [PATCH v2] " Kuninori Morimoto
2016-05-30  3:42         ` Vinod Koul

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