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Date: Thu, 6 Jun 2013 13:48:32 +1000 From: Dave Chinner <david@...morbit.com> To: Andi Kleen <andi@...stfloor.org> Cc: "J. Bruce Fields" <bfields@...ldses.org>, Waiman Long <waiman.long@...com>, Alexander Viro <viro@...iv.linux.org.uk>, Jeff Layton <jlayton@...hat.com>, Miklos Szeredi <mszeredi@...e.cz>, Ian Kent <raven@...maw.net>, Sage Weil <sage@...tank.com>, Steve French <sfrench@...ba.org>, Trond Myklebust <Trond.Myklebust@...app.com>, Eric Paris <eparis@...hat.com>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, autofs@...r.kernel.org, ceph-devel@...r.kernel.org, linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org, "Chandramouleeswaran, Aswin" <aswin@...com>, "Norton, Scott J" <scott.norton@...com> Subject: Re: [PATCH 0/3 v3] dcache: make it more scalable on large system On Wed, May 29, 2013 at 10:37:00PM +0200, Andi Kleen wrote: > > As Dave said before, is the last path component sufficient? Or how > > about an inode number? > > Neither works, the profiler needs to find the file and read it. > > inode searching would be incredible expensive, unless the file system > provided a "open-by-inode" primitive That's effectively what fs/fhandle.c gives you. Cheers, Dave. -- Dave Chinner david@...morbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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