> It might, a bit. Both mmap() and mprotect() currently take mmap_sem() for > writing. If we're careful, we could probably arrange for MADV_ULRICH to > take it for reading, which will help a little bit, hopefully.
The cache line bounces would be still there. Not sure that would help MySQL all that much. Besides if the down_write is the real problem one could convert the code for all cases over to optimistic locking assuming most calls don't merge. -Andi - 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/
