Messages in this thread | | | Date | Mon, 14 Jul 2008 16:17:40 +0200 | From | Brice Goglin <> | Subject | Re: [PATCH 1/2] I/OAT: Add watchdog/reset functionality to ioatdma driver |
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Maciej Sosnowski wrote: > Due to occasional DMA channel hangs observed for I/OAT versions 1.2 and 2.0 > a watchdog has been introduced to check every 2 seconds > if all channels progress normally. > If stuck channel is detected, driver resets it. > The reset is done in two parts. The second part is scheduled > by the first one to reinitialize the channel after the restart. >
Is all this transparent to the caller? Are you reposting all copies to the hardware after the reset? Or are we going to get some DMA_ERROR return values ?
> Sleep time in self_test has been increased to 10ms > since in some cases 1ms appeared not to be enough
Thanks Maciej, this helps a lot here.
Brice
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