On Wed, 2011-08-17 at 15:06 +0200, Marek Szyprowski wrote: [...] > > > Maybe for the first version a static pool with reasonably small size > > > (like 128KiB) will be more than enough? This size can be even board > > > depended or changed with kernel command line for systems that really > > > needs more memory. > > > > For a first version that sounds good enough. Maybe we could use a fraction > > of the CONSISTENT_DMA_SIZE as an estimate? > > Ok, good. For the initial values I will probably use 1/8 of > CONSISTENT_DMA_SIZE for coherent allocations. Writecombine atomic allocations > are extremely rare and rather ARM specific. 1/32 of CONSISTENT_DMA_SIZE should > be more than enough for them. For people who aren't aware, we have a patch to remove the define CONSISTENT_DMA_SIZE and replace it with a runtime call to an initialisation function [1]. I don't believe this fundamentally changes anything being discussed though. -- Tixy [1] http://www.spinics.net/lists/arm-kernel/msg135589.html -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>