>>> Jeremy Fitzhardinge <[EMAIL PROTECTED]> 11.01.08 18:28 >>> >Jan Beulich wrote: >> Don't rely on kmalloc(PAGE_SIZE) returning PAGE_SIZE aligned memory >> (Xen requires GDT *and* LDT to be page-aligned). > >Can kmalloc return non-page-aligned PAGE_SIZE allocations?
Documentation says it's to return pointer-size aligned memory - any excess alignment is therefore an implementation detail. (Nevertheless, afaics all current allocators generate page-aligned chunks.) >> Using the page >> allocator interface also removes the (albeit small) slab allocator >> overhead. > >Runtime or space overhead? Given that they're once-off allocations, the >time part isn't a big factor. And apparently LDT is completely unused. Both, but as I also said the saving is small. Jan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
