Rusty Russell wrote: > On Friday 30 May 2008 13:56:22 Christoph Lameter wrote: >> The per cpu allocator allows dynamic allocation of memory on all >> processors simultaneously. A bitmap is used to track used areas. >> The allocator implements tight packing to reduce the cache footprint >> and increase speed since cacheline contention is typically not a concern >> for memory mainly used by a single cpu. Small objects will fill up gaps >> left by larger allocations that required alignments. > > Allocator seems nice and simple, similar to existing one in module.c (which > predates cool bitmap operators). > > Being able to do per-cpu allocations in an interrupt handler seems like > encouraging a Bad Idea though: I'd be tempted to avoid the flags word, always > zero, and use a mutex instead of a spinlock. > > Cheers, > Rusty. I haven't seen any further discussion on these aspects... is there a consensus to remove the flags from CPU_ALLOC() and use a mutex? Thanks, Mike -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
