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authorDavid Chinner <dgc@sgi.com>2008-04-10 12:18:54 +1000
committerLachlan McIlroy <lachlan@redback.melbourne.sgi.com>2008-04-18 11:50:53 +1000
commit4679b2d36d53ed508c956337972fbbea8db99a77 (patch)
treea9b0449c2b0566bb8e8398ff6644def57f7455e3 /fs/xfs/xfs_log.c
parenteb01c9cd87c7a9998c2edf209721ea069e3e3652 (diff)
[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>
Diffstat (limited to 'fs/xfs/xfs_log.c')
-rw-r--r--fs/xfs/xfs_log.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 3cf115d8de75..319b98eb410c 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1237,9 +1237,9 @@ xlog_alloc_log(xfs_mount_t *mp,
XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
iclog->ic_bp = bp;
iclog->hic_data = bp->b_addr;
-
+#ifdef DEBUG
log->l_iclog_bak[i] = (xfs_caddr_t)&(iclog->ic_header);
-
+#endif
head = &iclog->ic_header;
memset(head, 0, sizeof(xlog_rec_header_t));
head->h_magicno = cpu_to_be32(XLOG_HEADER_MAGIC_NUM);
@@ -1250,7 +1250,6 @@ xlog_alloc_log(xfs_mount_t *mp,
head->h_fmt = cpu_to_be32(XLOG_FMT);
memcpy(&head->h_fs_uuid, &mp->m_sb.sb_uuid, sizeof(uuid_t));
-
iclog->ic_size = XFS_BUF_SIZE(bp) - log->l_iclog_hsize;
iclog->ic_state = XLOG_STATE_ACTIVE;
iclog->ic_log = log;