From 4679b2d36d53ed508c956337972fbbea8db99a77 Mon Sep 17 00:00:00 2001
From: David Chinner <dgc@sgi.com>
Date: Thu, 10 Apr 2008 12:18:54 +1000
Subject: [PATCH] [XFS] Reorganise xlog_t for better cacheline isolation of
 contention

To reduce contention on the log in large CPU count, separate out different
parts of the xlog_t structure onto different cachelines. Move each lock
onto a different cacheline along with all the members that are
accessed/modified while that lock is held.

Also, move the debugging code into debug code.

SGI-PV: 978729
SGI-Modid: xfs-linux-melb:xfs-kern:30772a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
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