On 11/08/16 11:44, Jan Beulich wrote: > When node zero has no memory, the DMA bit width will end up getting set > to 9, which is obviously not helpful to hold back a reasonable amount > of low enough memory for Dom0 to use for DMA purposes. Find the lowest > node with memory below 4Gb instead. > > Introduce arch_get_dma_bitsize() to keep this arch-specific logic out > of common code. > > Also adjust the original calculation: I think the subtraction of 1 > should have been part of the flsl() argument rather than getting > applied to its result. And while previously the division by 4 was valid > to be done on the flsl() result, this now also needs to be converted, > as is should only be applied to the spanned pages value. > > Signed-off-by: Jan Beulich <jbeul...@suse.com> > Acked-by: Julien Grall <julien.gr...@arm.com> > --- > v2: Extend commit message to reason about the calculation change. Add > a comment to the calculation.
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
