Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751213AbXBMJKE (ORCPT ); Tue, 13 Feb 2007 04:10:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751215AbXBMJKE (ORCPT ); Tue, 13 Feb 2007 04:10:04 -0500 Received: from wr-out-0506.google.com ([64.233.184.231]:34649 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751213AbXBMJJt (ORCPT ); Tue, 13 Feb 2007 04:09:49 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=S51e6NEes4m1FBBIv/Mr9wbKgyazRLIWkGCJdKEdfJy71AFbUcqdDigC38twRraRKyXXtCwAtSD1l/tiXqPOfbSyCbN7WEuIBR2k88TeOJXFk5JhpS8Ljw/Q3FjVzT01la32uhJSBWZgPCeH9Ao/+WisfbEBWCRqn6JO0c+ylsY= Message-ID: Date: Tue, 13 Feb 2007 17:09:46 +0800 From: "Jeff Chua" To: "Andi Kleen" Subject: Re: [PATCH] nanosecond filesystem support??? Cc: lkml , "Arjan van de Ven" , "Miquel van Smoorenburg" , "Linus Torvalds" In-Reply-To: <200702130952.26048.andi@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <200702130952.26048.andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 934 Lines: 27 On 2/13/07, Arjan van de Ven wrote: > it was there to avoid the following situation: > on disk it's still in seconds On 2/13/07, Andi Kleen wrote: > If you want ns resolution you need a file system that supports it: > that's currently XFS, JFS, NTFS/CIFS (resolution is lower, but < 1s), NFSv[34], UDF, > with suitable servers, tmpfs/ramfs/hugetlbfs. ext4 ns support is being worked on, > > BTW the real max resolution supported in the kernel right now is jiffies. Andy, Arjan, Ok, I got it now. Well, after reboot, I ran stat() and since the info has to come from disk, now the nanosec returned is zero! Thanks for all your help. Jeff. - 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/