"ext Siarhei Siamashka" <[EMAIL PROTECTED]> writes: > A while ago I looked for various kernel docs to see what's happening in the > wlan driver and what can be done to reduce cpu load. My impression was that > tasklet can be only preempted by hardware interrupts, so it is impossible to > sleep in it and give cpu resources to userland applications. If that is true, > no matter if n800 driver looks nicer, it must end up busylooping too.
Nope, on N800 cx3110x and omap2_mcspi do not busyloop during the DMA transfer. They use workqueues to allow sleeping, and completions for signalling. To be exact both cx3110x and omap2_mcspi do busyloop on certain occasions (waking up the chip etc.), but they do not busyloop during DMA. -- Kalle Valo _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
