From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755720AbbAWSDs (ORCPT ); Fri, 23 Jan 2015 13:03:48 -0500 Received: from mail-qa0-f54.google.com ([209.85.216.54]:39933 "EHLO mail-qa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751374AbbAWSDq (ORCPT ); Fri, 23 Jan 2015 13:03:46 -0500 From: Daniel Church To: Thomas Gleixner Cc: linux-kernel@vger.kernel.org, libc-alpha@sourceware.org Subject: [PATCH 0/2] posix-timers: Prevents overrun counter overflow, adds DELAYTIMER_MAX Date: Fri, 23 Jan 2015 13:03:29 -0500 Message-Id: <1422036211-10934-1-git-send-email-dchurch@andplus.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a timer overruns too many times before a call to timer_getoverrun the overrun count can overflow and go negative. POSIX.1-2001 specification of timer_getoverrun() supports constant DELAYTIMER_MAX which prevents overflow and caps overrun count. Adds delaytimer_max value, caps overrun count, and exposes value to userland via /proc/sys/kernel/delaytimer_max. Resolves https://bugzilla.kernel.org/show_bug.cgi?id=12665 - POSIX timers API does not support DELAYTIMER_MAX