Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761372AbXEOGHz (ORCPT ); Tue, 15 May 2007 02:07:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758980AbXEOGHr (ORCPT ); Tue, 15 May 2007 02:07:47 -0400 Received: from gw1.cosmosbay.com ([86.65.150.130]:59003 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756111AbXEOGHq (ORCPT ); Tue, 15 May 2007 02:07:46 -0400 Message-ID: <46494DFC.6080104@cosmosbay.com> Date: Tue, 15 May 2007 08:06:52 +0200 From: Eric Dumazet User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: Andrew Morton CC: Thomas Gleixner , john stultz , linux-kernel@vger.kernel.org, "bugme-daemon@kernel-bugs.osdl.org" , dang@gentoo.org, Andi Kleen Subject: Re: [Bugme-new] [Bug 8479] New: gettimeofday returning 1000000 in tv_usec on core2duo References: <200705150417.l4F4HlvS013354@fire-2.osdl.org> <20070514220901.90aab9e0.akpm@linux-foundation.org> In-Reply-To: <20070514220901.90aab9e0.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [86.65.150.130]); Tue, 15 May 2007 08:06:58 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1808 Lines: 44 Andrew Morton a ?crit : > On Mon, 14 May 2007 21:17:47 -0700 bugme-daemon@bugzilla.kernel.org wrote: > >> http://bugzilla.kernel.org/show_bug.cgi?id=8479 >> >> Summary: gettimeofday returning 1000000 in tv_usec on core2duo >> Kernel Version: 2.6.21 >> Status: NEW >> Severity: normal >> Owner: ak@suse.de >> Submitter: dang@gentoo.org >> >> >> Most recent kernel where this bug did *NOT* occur: 2.6.20 >> Distribution: Gentoo >> Hardware Environment: core2duo T7200 (all reporters had this same CPU) >> Software Environment: Linux 2.6.21, glibc 2.5 >> Problem Description: >> >> gettimeofday returns 1 - 1000000 in tv_usec, not 0 - 999999 >> This does not happen on any of my AMD-based 32 or 64 bit boxes, only on my >> core2duo; I have 2 other reports of this problem, all on T7200's >> >> Steps to reproduce: >> >> call gettimeofday a lot. Eventually, you'll get 1000000 returned in tv_usec. My >> average is ~1 in 1000000 calls. I've attached my test program, with output from >> various boxes. One of the other reporters tried the test program too, and got >> similar output. .config will be attached too. > > err, whoops. I remember I already hit this and corrected it http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=arch/x86_64/kernel/vsyscall.c;h=dc32cef961950915fbaa185e36ab802d5f7cea3b;hp=ba330f87067996a17495f7d03466d646c718b52c;hb=c8118c6c07f2edfd697aaa0b93e08c3b65a5a675;hpb=272a3713bb9e302e0455c894c41180a482d2c8a3 Maybe a stable push is necessary ? - 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/