From: Badari Pulavarty Subject: Re: [RFC] Heads up on sys_fallocate() Date: Thu, 01 Mar 2007 22:03:55 -0800 Message-ID: <45E7BE4B.5070602@us.ibm.com> References: <20070117094658.GA17390@amitarora.in.ibm.com> <20070225022326.137b4875.akpm@linux-foundation.org> <20070301183445.GA7911@amitarora.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, Andrew Morton , suparna@in.ibm.com, cmm@us.ibm.com, alex@clusterfs.com, suzuki@in.ibm.com To: "Amit K. Arora" Return-path: Received: from e4.ny.us.ibm.com ([32.97.182.144]:60701 "EHLO e4.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422936AbXCBGED (ORCPT ); Fri, 2 Mar 2007 01:04:03 -0500 Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Amit K. Arora wrote: >This is to give a heads up on few patches that we will be soon coming up >with. These patches implement a new system call sys_fallocate() and a >new inode operation "fallocate", for persistent preallocation. The new >system call, as Andrew suggested, will look like: > > asmlinkage long sys_fallocate(int fd, loff_t offset, loff_t len); > I am wondering about return values from this syscall ? Is it supposed to return the number of bytes allocated ? What about partial allocations ? What about if the blocks already exists ? What would be return values in those cases ? Just curious .. What does posix_fallocate() return ? Thanks, Badari >