Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751208Ab3EEAmD (ORCPT ); Sat, 4 May 2013 20:42:03 -0400 Received: from mail-vb0-f41.google.com ([209.85.212.41]:37851 "EHLO mail-vb0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750810Ab3EEAmB (ORCPT ); Sat, 4 May 2013 20:42:01 -0400 MIME-Version: 1.0 In-Reply-To: <20130505003028.GA24796@enc.com.au> References: <1366976933-5514-1-git-send-email-jslaby@suse.cz> <20130505003028.GA24796@enc.com.au> Date: Sat, 4 May 2013 17:42:00 -0700 X-Google-Sender-Auth: VDCBfQYA88mT4RdIIQg9pzTnhZ4 Message-ID: Subject: Re: [PATCH v2] TTY: fix atime/mtime regression From: Linus Torvalds To: Craig Small Cc: Jiri Slaby , Greg Kroah-Hartman , Jiri Slaby , Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1187 Lines: 23 On Sat, May 4, 2013 at 5:30 PM, Craig Small wrote: > > I saw someone wants the 10 second resolution, can I get it confirmed > that the kernel will only be updating at minute intervals (so the .1 > second stuff is completely useless) or 10 second (so the .1 second > stuff is just confusing for most of us). Yeah, it's roughly 10s right now (it's actually 8 seconds, because the power-of-two rounding is cheaper, whatever), and I think that's where it will remain. It seems sufficient for people to know if somebody is "active right now", while being seldom enough that you can't actually get any useful information (ie you can get the "hey, somebody *just* pressed a key by continually stat'ing the file, and get the timing of that one key to almost arbitrary precision, but you won't know the timing of any other keys for another eight seconds, so there's data there but no useful *information*). Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/