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92a005448f
linux/fs/xfs/libxfs
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Gao Xiang 92a005448f xfs: get rid of unnecessary xfs_perag_{get,put} pairs 
In the course of some operations, we look up the perag from
the mount multiple times to get or change perag information.
These are often very short pieces of code, so while the
lookup cost is generally low, the cost of the lookup is far
higher than the cost of the operation we are doing on the
perag.

Since we changed buffers to hold references to the perag
they are cached in, many modification contexts already hold
active references to the perag that are held across these
operations. This is especially true for any operation that
is serialised by an allocation group header buffer.

In these cases, we can just use the buffer's reference to
the perag to avoid needing to do lookups to access the
perag. This means that many operations don't need to do
perag lookups at all to access the perag because they've
already looked up objects that own persistent references
and hence can use that reference instead.

Cc: Dave Chinner <dchinner@redhat.com>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-07-14 08:47:33 -07:00
..
xfs_ag_resv.c xfs: fix missing header includes 2019-11-07 13:00:53 -08:00
xfs_ag_resv.h xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_ag.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_ag.h xfs: add a new ioctl to describe allocation group geometry 2019-04-14 18:15:57 -07:00
xfs_alloc_btree.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_alloc_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_alloc.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_alloc.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_attr_leaf.c xfs: more lockdep whackamole with kmem_alloc* 2020-05-27 08:49:28 -07:00
xfs_attr_leaf.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_attr_remote.c xfs: remove ATTR_KERNOVAL 2020-03-02 20:55:53 -08:00
xfs_attr_remote.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_attr_sf.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_attr.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_attr.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_bit.c xfs: fix missing header includes 2019-11-07 13:00:53 -08:00
xfs_bit.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_bmap_btree.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_bmap_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_bmap.c xfs: force writes to delalloc regions to unwritten 2020-05-27 08:49:28 -07:00
xfs_bmap.h xfs: redesign the reflink remap loop to fix blkres depletion crash 2020-07-06 10:46:57 -07:00
xfs_btree_staging.c xfs: support bulk loading of staged btrees 2020-03-18 08:12:23 -07:00
xfs_btree_staging.h xfs: support bulk loading of staged btrees 2020-03-18 08:12:23 -07:00
xfs_btree.c xfs: support bulk loading of staged btrees 2020-03-18 08:12:23 -07:00
xfs_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_cksum.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfs_da_btree.c xfs: xfs_dabuf_map should return ENOMEM when map allocation fails 2020-03-15 09:22:35 -07:00
xfs_da_btree.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_da_format.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_defer.c xfs: use ordered buffers to initialize dquot buffers during quotacheck 2020-05-19 09:40:56 -07:00
xfs_defer.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_dir2_block.c xfs: move the per-fork nextents fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_dir2_data.c xfs: check owner of dir3 data blocks 2020-03-12 07:58:12 -07:00
xfs_dir2_leaf.c xfs: add a function to deal with corrupt buffers post-verifiers 2020-03-12 07:58:12 -07:00
xfs_dir2_node.c xfs: check owner of dir3 free blocks 2020-03-12 07:58:12 -07:00
xfs_dir2_priv.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_dir2_sf.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_dir2.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_dir2.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_dquot_buf.c xfs: remove the xfs_disk_dquot_t and xfs_dquot_t 2019-11-13 11:13:45 -08:00
xfs_errortag.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_format.h xfs: remove the XFS_DFORK_Q macro 2020-05-19 09:40:58 -07:00
xfs_fs.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_health.h xfs: Use the correct style for SPDX License Identifier 2020-05-13 15:32:45 -07:00
xfs_ialloc_btree.c xfs: add support for inode btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_ialloc_btree.h xfs: add support for inode btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_ialloc.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_ialloc.h xfs: don't commit sunit/swidth updates to disk if that would cause repair failures 2019-12-19 07:53:48 -08:00
xfs_iext_tree.c xfs: fix inode fork extent count overflow 2019-10-21 09:04:58 -07:00
xfs_inode_buf.c xfs: remove xfs_inobp_check() 2020-07-07 07:15:09 -07:00
xfs_inode_buf.h xfs: remove xfs_inobp_check() 2020-07-07 07:15:09 -07:00
xfs_inode_fork.c xfs: cleanup xfs_idestroy_fork 2020-05-19 09:40:59 -07:00
xfs_inode_fork.h xfs: cleanup xfs_idestroy_fork 2020-05-19 09:40:59 -07:00
xfs_log_format.h xfs: only check the superblock version for dinode size calculation 2020-03-19 08:48:47 -07:00
xfs_log_recover.h xfs: move log recovery buffer cancellation code to xfs_buf_item_recover.c 2020-05-08 08:50:01 -07:00
xfs_log_rlimit.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_quota_defs.h xfs: always return -ENOSPC on project quota reservation failure 2020-05-27 08:49:25 -07:00
xfs_refcount_btree.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_refcount_btree.h xfs: add support for refcount btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_refcount.c xfs: make the btree ag cursor private union anonymous 2020-03-13 10:37:15 -07:00
xfs_refcount.h xfs: remove unnecessary int returns from deferred refcount functions 2019-08-28 08:31:02 -07:00
xfs_rmap_btree.c xfs: get rid of unnecessary xfs_perag_{get,put} pairs 2020-07-14 08:47:33 -07:00
xfs_rmap_btree.h xfs: add support for rmap btree staging cursors 2020-03-18 08:12:23 -07:00
xfs_rmap.c xfs: convert btree cursor ag-private member name 2020-03-13 10:37:14 -07:00
xfs_rmap.h xfs: reinitialize rm_flags when unpacking an offset into an rmap irec 2019-08-28 08:31:02 -07:00
xfs_rtbitmap.c xfs: rename xfs_bmap_is_real_extent to is_written_extent 2020-07-06 10:46:57 -07:00
xfs_sb.c xfs: fix the warning message in xfs_validate_sb_common() 2020-05-19 09:40:56 -07:00
xfs_sb.h xfs: change some error-less functions to void types 2019-05-01 20:26:30 -07:00
xfs_shared.h xfs: preserve rmapbt swapext block reservation from freed blocks 2020-07-06 10:46:56 -07:00
xfs_symlink_remote.c xfs: move the fork format fields into struct xfs_ifork 2020-05-19 09:40:58 -07:00
xfs_trans_inode.c xfs: attach inodes to the cluster buffer when dirtied 2020-07-07 07:15:08 -07:00
xfs_trans_resv.c xfs: add a new xfs_sb_version_has_v3inode helper 2020-03-19 08:47:34 -07:00
xfs_trans_resv.h xfs: convert to SPDX license tags 2018-06-06 14:17:53 -07:00
xfs_trans_space.h xfs: separate inode geometry 2019-06-12 08:37:40 -07:00
xfs_types.c xfs: remove unused header files 2019-06-28 19:30:43 -07:00
xfs_types.h xfs: remove unused structure members & simple typedefs 2019-11-13 18:22:41 -08:00