On Sat, 19 Jan 2008, Anton Salikhmetov wrote: > > Before using pte_wrprotect() the vma_wrprotect() routine uses the > pte_offset_map_lock() macro to get the PTE and to acquire the ptl > spinlock. Why did you say that this code was not SMP-safe? It should > be atomic, I think.
It's atomic WITH RESPECT TO OTHER PEOPLE WHO GET THE LOCK. Guess how much another x86 CPU cares when it sets the accessed bit in hardware? > The POSIX standard requires the ctime and mtime stamps to be updated > not later than at the second call to msync() with the MS_ASYNC flag. .. and that is no excuse for bad code. Linus -- 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/