From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: Proposal: Use hi-res clock for file timestamps Date: Wed, 18 Aug 2010 19:50:40 +0200 Message-ID: <20100818175040.GA6567@basil.fritz.box> References: <87aaolwar8.fsf@basil.nowhere.org> <20100817174134.GA23176@fieldses.org> <20100817182920.GD18161@basil.fritz.box> <20100817190447.GA28049@fieldses.org> <20100817203941.729830b7@lxorguk.ukuu.org.uk> <20100817192937.GD26609@fieldses.org> <20100818155359.66b9ddb6@notabene> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "J. Bruce Fields" , Alan Cox , "Patrick J. LoPresti" , Andi Kleen , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel To: Neil Brown Return-path: Content-Disposition: inline In-Reply-To: <20100818155359.66b9ddb6@notabene> Sender: linux-nfs-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org > - nfsd updates it whenever it reads an mtime out of an inode that matches > current_fs_time to the granularity of 1/HZ. That means you have a very very hot cache line on a larger system if there are a lot of mtime changes. Probably a bad idea. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html