From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id AECD57F37 for ; Sat, 25 Apr 2015 09:57:35 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay3.corp.sgi.com (Postfix) with ESMTP id 39CC1AC002 for ; Sat, 25 Apr 2015 07:57:31 -0700 (PDT) Received: from ZenIV.linux.org.uk (zeniv.linux.org.uk [195.92.253.2]) by cuda.sgi.com with ESMTP id db1WPd7xPF45yGo0 (version=TLSv1 cipher=AES256-SHA bits=256 verify=NO) for ; Sat, 25 Apr 2015 07:57:30 -0700 (PDT) Date: Sat, 25 Apr 2015 15:57:28 +0100 From: Al Viro Subject: Re: [PATCH 5/6] xfs: move non-inline symlinks to the pagecache Message-ID: <20150425145728.GE889@ZenIV.linux.org.uk> References: <1429816064-10033-1-git-send-email-hch@lst.de> <1429816064-10033-6-git-send-email-hch@lst.de> <20150423222942.GK15810@dastard> <20150425141612.GA4153@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20150425141612.GA4153@lst.de> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Christoph Hellwig Cc: linux-fsdevel@vger.kernel.org, xfs@oss.sgi.com On Sat, Apr 25, 2015 at 04:16:12PM +0200, Christoph Hellwig wrote: > Al, what do you think about adding a new > > i_link member to the union of i_pipe, i_bdev and i_cdev. That we > we can cache a link acquired by any way for direct use in the VFS. > > This has a few use cases: inline links can be set up directly > when reading the inode, and we never need to call into ->follow_link. > > Formats like the XFS v5 symlinks can be read in once by whatever > way we want, and following accesses can be done RCU safe and > without calling into the filesystem. > > Note that caching the symlink in a kmalloc'ed buffer might be > more efficient than the pagecache for most cases anyway. Hmm... When would you free the sucker? _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs