From 9fa47bdcd33b117599e9ee3f2e315cb47939ac2d Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Thu, 23 Sep 2021 12:21:37 -0700 Subject: xfs: use separate btree cursor cache for each btree type Now that we have the infrastructure to track the max possible height of each btree type, we can create a separate slab cache for cursors of each type of btree. For smaller indices like the free space btrees, this means that we can pack more cursors into a slab page, improving slab utilization. Signed-off-by: Darrick J. Wong Reviewed-by: Dave Chinner --- fs/xfs/libxfs/xfs_alloc_btree.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) (limited to 'fs/xfs/libxfs/xfs_alloc_btree.c') diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c index d0a7aa4b52a8..609d349e7bd4 100644 --- a/fs/xfs/libxfs/xfs_alloc_btree.c +++ b/fs/xfs/libxfs/xfs_alloc_btree.c @@ -20,6 +20,7 @@ #include "xfs_trans.h" #include "xfs_ag.h" +static kmem_zone_t *xfs_allocbt_cur_cache; STATIC struct xfs_btree_cur * xfs_allocbt_dup_cursor( @@ -477,7 +478,8 @@ xfs_allocbt_init_common( ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT); - cur = xfs_btree_alloc_cursor(mp, tp, btnum, mp->m_alloc_maxlevels); + cur = xfs_btree_alloc_cursor(mp, tp, btnum, mp->m_alloc_maxlevels, + xfs_allocbt_cur_cache); cur->bc_ag.abt.active = false; if (btnum == XFS_BTNUM_CNT) { @@ -617,3 +619,22 @@ xfs_allocbt_calc_size( { return xfs_btree_calc_size(mp->m_alloc_mnr, len); } + +int __init +xfs_allocbt_init_cur_cache(void) +{ + xfs_allocbt_cur_cache = kmem_cache_create("xfs_bnobt_cur", + xfs_btree_cur_sizeof(xfs_allocbt_maxlevels_ondisk()), + 0, 0, NULL); + + if (!xfs_allocbt_cur_cache) + return -ENOMEM; + return 0; +} + +void +xfs_allocbt_destroy_cur_cache(void) +{ + kmem_cache_destroy(xfs_allocbt_cur_cache); + xfs_allocbt_cur_cache = NULL; +} -- cgit v1.2.3