From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Allen Pais <allen.lkml@gmail.com>
Cc: Vinod Koul <vkoul@kernel.org>, Frank Li <Frank.Li@kernel.org>,
dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>, Kees Cook <kees@kernel.org>,
Viresh Kumar <vireshk@kernel.org>
Subject: Re: [PATCH v3 31/34] dmaengine: dw: defer callbacks via channel BH
Date: Tue, 11 Aug 2026 13:51:49 +0300 [thread overview]
Message-ID: <anr-xeE3ccxJth3x@ashevche-desk.local> (raw)
In-Reply-To: <51d53a46331dd58a67e71cb8c53c6e67f4b5503e.1786384169.git.allen.lkml@gmail.com>
On Mon, Aug 10, 2026 at 11:09:32AM -0700, Allen Pais wrote:
> Queue completed descriptors on the channel and invoke their callbacks
> from per-channel BH work instead of the controller tasklet. Add a
> synchronize hook so termination can wait for deferred callbacks before
> their descriptor storage is released.
This driver is so old and got a lot of stuff that may be cleaned up with
converting it to use virt-dma. Have you considered that option?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-08-11 10:51 UTC|newest]
Thread overview: 223+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-08 8:03 [RFC PATCH 0/1] dmaengine: introduce dmaengine_bh_wq and bh helpers Allen Pais
2026-01-08 8:03 ` [RFC PATCH 1/1] " Allen Pais
2026-01-08 10:26 ` Arnd Bergmann
2026-01-08 19:22 ` Allen
2026-01-09 16:42 ` Arnd Bergmann
2026-01-12 22:20 ` Allen
2026-01-13 7:33 ` Arnd Bergmann
2026-01-13 19:31 ` Allen
2026-01-12 6:26 ` kernel test robot
2026-01-14 7:13 ` kernel test robot
2026-01-14 7:35 ` kernel test robot
2026-01-14 8:49 ` kernel test robot
2026-07-27 20:28 ` [PATCH v2 00/64] dmaengine: migrate channel tasklets to WQ_BH Allen Pais
2026-07-27 20:28 ` [PATCH v2 01/64] dmaengine: add tasklet-backed channel BH helpers Allen Pais
2026-07-27 20:56 ` sashiko-bot
2026-07-29 12:46 ` Vinod Koul
2026-07-29 12:48 ` Vinod Koul
2026-08-04 3:32 ` Allen
2026-07-27 20:28 ` [PATCH v2 02/64] dmaengine: back channel BH helpers with WQ_BH Allen Pais
2026-07-27 20:28 ` [PATCH v2 03/64] dmaengine: apple-admac: use dma_chan BH callback Allen Pais
2026-07-27 20:28 ` [PATCH v2 04/64] dmaengine: at_xdmac: move irq bottom half to dma_chan BH Allen Pais
2026-07-27 20:56 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 05/64] dmaengine: ep93xx: hook callbacks via " Allen Pais
2026-07-27 20:59 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 06/64] dmaengine: fsldma: migrate tasklet to " Allen Pais
2026-07-27 20:56 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 07/64] dmaengine: fsl_raid: run completions via " Allen Pais
2026-07-27 20:55 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 08/64] dmaengine: imx-dma: flip per-chan tasklet to " Allen Pais
2026-07-27 20:57 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 09/64] dmaengine: ioat: convert cleanup " Allen Pais
2026-07-27 20:38 ` Dave Jiang
2026-07-27 21:02 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 10/64] dmaengine: mmp_pdma: replace per-chan tasklet with " Allen Pais
2026-07-27 20:54 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 11/64] dmaengine: mmp_tdma: hook completions to " Allen Pais
2026-07-27 20:55 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 12/64] dmaengine: mv_xor: convert irq tasklet " Allen Pais
2026-07-27 20:57 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 13/64] dmaengine: mxs-dma: use dma_chan BH scheduling Allen Pais
2026-07-27 20:59 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 14/64] dmaengine: nbpfaxi: switch callbacks to dma_chan BH Allen Pais
2026-07-27 20:28 ` [PATCH v2 15/64] dmaengine: pch_dma: convert tasklet " Allen Pais
2026-07-27 20:57 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 16/64] dmaengine: ppc4xx: replace irq tasklet with " Allen Pais
2026-07-27 20:54 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 17/64] dmaengine: ste_dma40: convert per-channel tasklet to " Allen Pais
2026-07-27 21:00 ` sashiko-bot
2026-07-28 19:33 ` Linus Walleij
2026-07-27 20:28 ` [PATCH v2 18/64] dmaengine: xgene-dma: wire descriptor cleanup " Allen Pais
2026-07-27 20:59 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 19/64] dmaengine: xilinx-dma: use dma_chan BH instead of tasklets Allen Pais
2026-07-27 20:59 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 20/64] dmaengine: xilinx-dpdma: kill vchan BH on remove Allen Pais
2026-07-27 20:59 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 21/64] dmaengine: zynqmp-dma: switch completion tasklet to dma_chan BH Allen Pais
2026-07-27 20:54 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 22/64] dmaengine: tegra20-apb: use channel BH helpers Allen Pais
2026-07-27 20:28 ` [PATCH v2 23/64] dmaengine: timb_dma: route callbacks via channel BH Allen Pais
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 24/64] dmaengine: txx9dmac: " Allen Pais
2026-07-27 21:00 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 25/64] dmaengine: mv_xor_v2: use channel BH helpers Allen Pais
2026-07-27 21:02 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 26/64] dmaengine: mpc512x: route callbacks via channel BH Allen Pais
2026-07-27 21:07 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 27/64] dmaengine: k3dma: kill vchan BH on remove Allen Pais
2026-07-27 21:02 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 28/64] dmaengine: plx_dma: use channel BH helpers Allen Pais
2026-07-27 20:38 ` Logan Gunthorpe
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 29/64] dmaengine: sf-pdma: route error callbacks through channel BH Allen Pais
2026-07-27 20:28 ` Allen Pais
2026-07-27 21:06 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 30/64] dmaengine: sa11x0-dma: kill vchan BH on remove Allen Pais
2026-07-27 21:07 ` sashiko-bot
2026-07-27 20:28 ` [PATCH v2 31/64] dmaengine: pl330: route callbacks via channel BH Allen Pais
2026-07-27 20:34 ` Allen Pais
2026-07-27 21:07 ` sashiko-bot
2026-07-27 20:34 ` [PATCH v2 32/64] dmaengine: k3-udma: use channel BH for vchan completions Allen Pais
2026-07-27 21:10 ` sashiko-bot
2026-07-27 20:36 ` [PATCH v2 33/64] dmaengine: sun6i: kill vchan BH on teardown Allen Pais
2026-07-27 21:08 ` sashiko-bot
2026-07-27 20:37 ` [PATCH v2 34/64] dmaengine: mtk-cqdma: " Allen Pais
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:38 ` [PATCH v2 35/64] dmaengine: altera-msgdma: use channel BH helpers Allen Pais
2026-07-27 21:06 ` sashiko-bot
2026-07-27 20:38 ` [PATCH v2 36/64] dmaengine: sprd-dma: kill vchan BH on teardown Allen Pais
2026-07-27 21:07 ` sashiko-bot
2026-07-27 20:38 ` [PATCH v2 37/64] dmaengine: idma64: " Allen Pais
2026-07-27 21:07 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 38/64] dmaengine: img-mdc-dma: " Allen Pais
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 39/64] dmaengine: fsl-edma-common: " Allen Pais
2026-07-27 21:14 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 40/64] dmaengine: dw-axi-dmac: " Allen Pais
2026-07-27 21:11 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 41/64] dmaengine: hsu: " Allen Pais
2026-07-27 21:10 ` sashiko-bot
2026-07-28 8:47 ` Andy Shevchenko
2026-07-27 20:39 ` [PATCH v2 42/64] dmaengine: jz4780: " Allen Pais
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 43/64] dmaengine: pxa_dma: " Allen Pais
2026-07-27 21:10 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 44/64] dmaengine: mtk-hsdma: " Allen Pais
2026-07-27 21:09 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 45/64] dmaengine: mtk-uart-apdma: " Allen Pais
2026-07-27 21:14 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 46/64] dmaengine: imx-sdma: " Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 47/64] dmaengine: loongson1-apb: " Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 48/64] dmaengine: owl-dma: " Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 49/64] dmaengine: hisi: " Allen Pais
2026-07-27 21:20 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 50/64] dmaengine: dw-edma: " Allen Pais
2026-07-27 21:18 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 51/64] dmaengine: bcm2835: " Allen Pais
2026-07-27 21:20 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 52/64] dmaengine: tegra210-adma: " Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 53/64] dmaengine: fsl-qdma: use dma_chan_kill_bh Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 54/64] dmaengine: st_fdma: " Allen Pais
2026-07-27 21:18 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 55/64] dmaengine: dma-axi-dmac: " Allen Pais
2026-07-27 21:18 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 56/64] dmaengine: omap-dma: " Allen Pais
2026-07-27 21:25 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 57/64] dmaengine: edma: " Allen Pais
2026-07-27 21:20 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 58/64] dmaengine: qcom-adm: " Allen Pais
2026-07-27 21:17 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 59/64] dmaengine: tegra186-gpc: " Allen Pais
2026-07-27 21:23 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 60/64] dmaengine: bam-dma: " Allen Pais
2026-07-27 21:19 ` sashiko-bot
2026-07-28 8:38 ` Bartosz Golaszewski
2026-07-27 20:39 ` [PATCH v2 61/64] dmaengine: dw: defer callbacks via channel BH Allen Pais
2026-07-27 21:31 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 62/64] dmaengine: hidma: " Allen Pais
2026-07-27 21:25 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 63/64] dmaengine: qcom-gpi: defer callbacks via vchan Allen Pais
2026-07-27 21:24 ` sashiko-bot
2026-07-27 20:39 ` [PATCH v2 64/64] dmaengine: switchtec: use channel BH helpers Allen Pais
2026-07-27 21:08 ` Logan Gunthorpe
2026-07-27 21:22 ` sashiko-bot
2026-07-28 20:39 ` [PATCH v2 00/64] dmaengine: migrate channel tasklets to WQ_BH Arnd Bergmann
2026-08-04 3:29 ` Allen
2026-08-10 18:09 ` [PATCH v3 00/34] " Allen Pais
2026-08-10 18:09 ` [PATCH v3 01/34] dmaengine: add tasklet-backed channel BH helpers Allen Pais
2026-08-10 18:09 ` Allen Pais
2026-08-10 18:30 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 02/34] dmaengine: back channel BH helpers with WQ_BH Allen Pais
2026-08-10 18:09 ` [PATCH v3 03/34] dmaengine: apple-admac: use dmaengine BH callback Allen Pais
2026-08-10 18:29 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 04/34] dmaengine: at_xdmac: move irq bottom half to dmaengine BH Allen Pais
2026-08-10 18:35 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 05/34] dmaengine: ep93xx: hook callbacks via " Allen Pais
2026-08-10 18:31 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 06/34] dmaengine: fsldma: migrate tasklet to " Allen Pais
2026-08-10 18:29 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 07/34] dmaengine: fsl_raid: run completions via " Allen Pais
2026-08-10 18:27 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 08/34] dmaengine: imx-dma: flip per-chan tasklet to " Allen Pais
2026-08-10 18:34 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 09/34] dmaengine: ioat: convert cleanup " Allen Pais
2026-08-10 18:27 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 10/34] dmaengine: mmp_pdma: replace per-chan tasklet with " Allen Pais
2026-08-10 18:28 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 11/34] dmaengine: mmp_tdma: hook completions to " Allen Pais
2026-08-10 18:28 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 12/34] dmaengine: mv_xor: convert irq tasklet " Allen Pais
2026-08-10 18:27 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 13/34] dmaengine: mxs-dma: use dmaengine BH scheduling Allen Pais
2026-08-10 18:27 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 14/34] dmaengine: nbpfaxi: switch callbacks to dmaengine BH Allen Pais
2026-08-10 18:23 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 15/34] dmaengine: pch_dma: convert tasklet " Allen Pais
2026-08-10 18:34 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 16/34] dmaengine: ppc4xx: replace irq tasklet with " Allen Pais
2026-08-10 18:36 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 17/34] dmaengine: ste_dma40: convert per-channel tasklet to " Allen Pais
2026-08-10 18:34 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 18/34] dmaengine: xgene-dma: wire descriptor cleanup " Allen Pais
2026-08-10 18:35 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 19/34] dmaengine: xilinx-dma: use dmaengine BH instead of tasklets Allen Pais
2026-08-10 18:28 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 20/34] dmaengine: xilinx-dpdma: kill vchan BH on remove Allen Pais
2026-08-10 18:31 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 21/34] dmaengine: zynqmp-dma: switch completion tasklet to dmaengine BH Allen Pais
2026-08-10 18:35 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 22/34] dmaengine: tegra20-apb: use channel BH helpers Allen Pais
2026-08-10 18:40 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 23/34] dmaengine: timb_dma: route callbacks via channel BH Allen Pais
2026-08-10 18:45 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 24/34] dmaengine: txx9dmac: " Allen Pais
2026-08-10 18:34 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 25/34] dmaengine: mv_xor_v2: use channel BH helpers Allen Pais
2026-08-10 18:46 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 26/34] dmaengine: mpc512x: route callbacks via channel BH Allen Pais
2026-08-10 18:50 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 27/34] dmaengine: plx_dma: use channel BH helpers Allen Pais
2026-08-10 18:39 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 28/34] dmaengine: sf-pdma: route error callbacks through channel BH Allen Pais
2026-08-10 18:09 ` Allen Pais
2026-08-10 18:41 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 29/34] dmaengine: pl330: route callbacks via " Allen Pais
2026-08-10 18:39 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 30/34] dmaengine: altera-msgdma: use channel BH helpers Allen Pais
2026-08-10 18:49 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 31/34] dmaengine: dw: defer callbacks via channel BH Allen Pais
2026-08-10 18:44 ` sashiko-bot
2026-08-11 10:51 ` Andy Shevchenko [this message]
2026-08-10 18:09 ` [PATCH v3 32/34] dmaengine: hidma: " Allen Pais
2026-08-10 18:45 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 33/34] dmaengine: qcom-gpi: defer callbacks via vchan Allen Pais
2026-08-10 18:50 ` sashiko-bot
2026-08-10 18:09 ` [PATCH v3 34/34] dmaengine: switchtec: use channel BH helpers Allen Pais
2026-08-10 18:43 ` sashiko-bot
2026-08-11 10:30 ` [PATCH v3 00/34] dmaengine: migrate channel tasklets to WQ_BH Andy Shevchenko
2026-08-11 10:50 ` Andy Shevchenko
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