From: rbairva@gmail.com (rd bairva)
To: linux-arm-kernel@lists.infradead.org
Subject: Dmaengine problem
Date: Wed, 14 Apr 2010 12:01:51 +0530 [thread overview]
Message-ID: <m2pdbb048f61004132331r7af5c2a7o27c9f43124a35095@mail.gmail.com> (raw)
Hi,
? ? ? ?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
reply other threads:[~2010-04-14 6:31 UTC|newest]
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