Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757612AbYFJWCu (ORCPT ); Tue, 10 Jun 2008 18:02:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753616AbYFJWCm (ORCPT ); Tue, 10 Jun 2008 18:02:42 -0400 Received: from sovereign.computergmbh.de ([85.214.69.204]:45429 "EHLO sovereign.computergmbh.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752887AbYFJWCm (ORCPT ); Tue, 10 Jun 2008 18:02:42 -0400 Date: Wed, 11 Jun 2008 00:02:40 +0200 (CEST) From: Jan Engelhardt To: Maxim Shchetynin cc: Matthew Wilcox , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: AZFS file system proposal In-Reply-To: <20080610104919.504b9826@mercedes-benz.boeblingen.de.ibm.com> Message-ID: References: <20080609104650.4f220492@mercedes-benz.boeblingen.de.ibm.com> <20080609125530.GF30405@parisc-linux.org> <20080610104919.504b9826@mercedes-benz.boeblingen.de.ibm.com> User-Agent: Alpine 1.10 (LNX 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1265 Lines: 37 On Tuesday 2008-06-10 10:49, Maxim Shchetynin wrote: > >What do you think about the following - shorter description and a better place for it (moved to "Pseudo filesystems"): > >--- linux-2.6.26-rc5/fs/Kconfig 2008-06-05 05:10:44.000000000 +0200 >+++ linux-2.6.26-rc5-azfs/fs/Kconfig 2008-06-10 10:43:24.326686538 +0200 >@@ -1017,6 +1017,19 @@ > config HUGETLB_PAGE > def_bool HUGETLBFS > >+config AZ_FS >+ tristate "AZFS filesystem support" This is slightly redundant, it should probably be tristate "AZ filesystem support" >+ help >+ azfs is a file system for I/O attached memory backing. It requires >+ a block device with direct_access capability, e.g. axonram. (a) What is axonram? (b) why is axonram direct_access, and my other devices (including standard PC RAM) not? >+ Mounting such device with azfs gives memory mapped access to the >+ underlying memory to user space. Can't I just mmap(/dev/theblockdevice), why would I need to go through azfs? -- 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/