From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Improve lseek scalability
Date: Mon, 22 Aug 2011 13:49:05 -0700
Message-ID: <1314046152-2175-1-git-send-email-andi@firstfloor.org>
Cc: hch@infradead.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
To: viro@zeniv.linux.org.uk
Return-path: <linux-kernel-owner@vger.kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

Currently generic_file_llseek users synchronize all on the inode i_mutex,
which is very heavy handed because it affects even different processes.

This patchkit attempts to make generic_file_llseek (mostly) lockless.

For details see the individual patches.

This is a repost of the earlier version which got some reviews.

v2: Forward ported to recent kernel. Add SEEK_DATA/HOLE support.
Fix a nasty SEEK_END bug in the previous version.

-Andi