On Fri, Oct 17, 2014 at 03:35:01PM +0000, Mathieu Desnoyers wrote: > > > The page fault handler being very much performance sensitive, I'm > > > wondering if it would not be better to move cow_page near the end of > > > struct vm_fault, so that the "page" field can stay on the first > > > cache line. > > Although it's pretty much always true that recent architectures L2 cache > lines are 64 bytes, I was more thinking about L1 cache lines, which are, > at least on moderately old Intel Pentium HW, 32 bytes in size (AFAIK > Pentium II and III). > > It remains to be seen whether we care about performance that much on this > kind of HW though. Oh, I just remembered ... this data structure is on the stack, so if it's not cache-hot, something has gone horribly wrong. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
