On Thu, Jun 27, 2013 at 05:34:33PM -0700, Andrew Morton wrote: > > If so, userland daemon would receive lots of events which are no interest. > > "lots"? If vmpressure is generating events at such a high frequency that > this matters then it's already busted?
Current frequency is 1/(2MB). Suppose we ended up scanning the whole memory on a 2GB host, this will give us 1024 hits. Doesn't feel too much* to me... But for what it worth, I am against adding read() to the interface -- just because we can avoid the unnecessary switch into the kernel. * For bigger hosts we should increase the window, as we do for the vmstat. -- 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/
