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Date: Wed, 14 Apr 2010 11:56:58 +0530 From: rd bairva <rbairva@...il.com> To: dan.j.williams@...el.com Cc: linux-arm-kernel@...ts.arm.linux.org.uk, linux-kernel@...r.kernel.org Subject: Dmaengine query Hi Dan, I am currently writing dmaengine compatible DMA driver for our ARM based architecture, But I am facing some performance issues doing that. 1. dmaengine says callback should run in tasklet, and next transfer cannot be scheduled from the callback. Due to these restrictions I am getting some performance issue while playing sound in our architecture. Can callback call in DMA driver be placed out of spin_lock to submit new operations from callback? (only in asynchronous case) is this Ok? please comment. Thanks and regards, Ramdayal -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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