Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965780AbWKEBys (ORCPT ); Sat, 4 Nov 2006 20:54:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965781AbWKEBys (ORCPT ); Sat, 4 Nov 2006 20:54:48 -0500 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:58577 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S965780AbWKEByr (ORCPT ); Sat, 4 Nov 2006 20:54:47 -0500 Subject: Re: New filesystem for Linux From: Alan Cox To: Mikulas Patocka Cc: Eric Dumazet , linux-kernel@vger.kernel.org In-Reply-To: References: <454A76CC.6030003@cosmosbay.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Sun, 05 Nov 2006 01:58:56 +0000 Message-Id: <1162691936.21654.63.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 (2.6.2-1.fc5.5) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 625 Lines: 15 Ar Sad, 2006-11-04 am 19:40 +0100, ysgrifennodd Mikulas Patocka: > > The problem with a per_cpu biglock is that you may consume a lot of RAM for > > big NR_CPUS. Count 32 KB per 'biglock' if NR_CPUS=1024 > > Does one Linux kernel run on system with 1024 cpus? I guess it must fry > spinlocks... (or even lockup due to spinlock livelocks) Altix goes that big and bigger. Alan - 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/