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874b1ef0ef
linux/fs/ocfs2
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Jia Guo 874b1ef0ef ocfs2: optimize the reading of heartbeat data 
Reading heartbeat data from lowest node rather than from zero, in cases
where the node is not defined from zero, can reduce the number of sectors
read.

Here is a simple test data obtained with 'iostat -dmx dm-5 2', with
two nodes in the cluster, node number 10, 20, respectively.

Before optimization:
Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
dm-5              0.00     0.00    0.50    0.50     0.01     0.00    11.00     0.00    1.00    1.00    1.00   1.50   0.15

After the optimization:
Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
dm-5              0.00     0.00    0.50    0.50     0.00     0.00     6.00     0.00    0.50    1.00    0.00   0.50   0.05

Link: http://lkml.kernel.org/r/99fe4988-69ac-3615-a218-3042fe6fbe72@huawei.com
Signed-off-by: Jia Guo <guojia12@huawei.com>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-12-28 12:11:45 -08:00
..
cluster ocfs2: optimize the reading of heartbeat data 2018-12-28 12:11:45 -08:00
dlm fs/ocfs2/dlm/dlmdebug.c: fix a sleep-in-atomic-context bug in dlm_print_one_mle() 2018-10-26 16:25:18 -07:00
dlmfs vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
acl.c ocfs2/acl: use 'ip_xattr_sem' to protect getting extended attribute 2018-01-31 17:18:35 -08:00
acl.h ocfs2: make ocfs2_set_acl() static 2017-09-06 17:27:24 -07:00
alloc.c ocfs2: remove unused pointer 'eb' 2018-10-26 16:25:18 -07:00
alloc.h ocfs2: try to reuse extent block in dealloc without meta_alloc 2018-01-31 17:18:35 -08:00
aops.c ocfs2: free up write context when direct IO failed 2018-11-18 10:15:09 -08:00
aops.h ocfs2: keep the trace point consistent with the function name 2018-04-05 21:36:21 -07:00
blockcheck.c
blockcheck.h
buffer_head_io.c ocfs2: don't put and assigning null to bh allocated outside 2018-11-03 10:09:37 -07:00
buffer_head_io.h ocfs2: clean up some unused function declarations 2017-11-15 18:21:01 -08:00
dcache.c
dcache.h
dir.c ocfs2: fix a misuse a of brelse after failing ocfs2_check_dir_entry 2018-11-03 10:09:37 -07:00
dir.h
dlmglue.c ocfs2: dlmglue: clean up timestamp handling 2018-11-03 10:09:37 -07:00
dlmglue.h ocfs2: ocfs2_inode_lock_tracker does not distinguish lock level 2018-06-07 17:34:33 -07:00
export.c ocfs2: fix potential use after free 2018-11-30 14:56:15 -08:00
export.h
extent_map.c ocfs2: add ocfs2_overwrite_io() 2018-01-31 17:18:35 -08:00
extent_map.h ocfs2: add ocfs2_overwrite_io() 2018-01-31 17:18:35 -08:00
file.c ocfs2: don't use iocb when EIOCBQUEUED returns 2018-11-03 10:09:37 -07:00
file.h ocfs2: clean up redundant function declarations 2018-06-07 17:34:33 -07:00
filecheck.c ocfs2: add duplicated ino number check 2018-04-05 21:36:22 -07:00
filecheck.h ocfs2: add kobject for online file check 2018-04-05 21:36:22 -07:00
heartbeat.c
heartbeat.h
inode.c ocfs2: clean up some unnecessary code 2018-08-17 16:20:27 -07:00
inode.h
ioctl.c ocfs2: eliminate a misreported warning 2018-06-07 17:34:33 -07:00
ioctl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
journal.c ocfs2: without quota support, avoid calling quota recovery 2018-11-03 10:09:37 -07:00
journal.h
Kconfig
localalloc.c ocfs2: return -EROFS when filesystem becomes read-only 2018-08-17 16:20:27 -07:00
localalloc.h
locks.c ocfs2: properly initial file_lock used for unlock. 2018-11-30 11:26:12 -05:00
locks.h
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmap.c fs: ocfs2: use new return type vm_fault_t 2018-06-07 17:34:34 -07:00
mmap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
move_extents.c ocfs2: fix deadlock caused by ocfs2_defrag_extent() 2018-11-30 14:56:13 -08:00
move_extents.h
namei.c ocfs2: drop a VLA in ocfs2_orphan_del() 2018-06-07 17:34:34 -07:00
namei.h
ocfs1_fs_compat.h
ocfs2_fs.h ocfs2: correct the comments position of struct ocfs2_dir_block_trailer 2018-06-07 17:34:34 -07:00
ocfs2_ioctl.h
ocfs2_lockid.h ocfs2: add trimfs dlm lock resource 2018-01-31 17:18:35 -08:00
ocfs2_lockingver.h
ocfs2_trace.h ocfs2: keep the trace point consistent with the function name 2018-04-05 21:36:21 -07:00
ocfs2.h ocfs2: add kobject for online file check 2018-04-05 21:36:22 -07:00
quota_global.c ocfs2: convert to new i_version API 2018-01-29 06:42:21 -05:00
quota_local.c ocfs2: return -EROFS when filesystem becomes read-only 2018-08-17 16:20:27 -07:00
quota.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
refcounttree.c vfs: rework data cloning infrastructure 2018-11-02 09:33:08 -07:00
refcounttree.h ocfs2: remove ocfs2_reflink_remap_range 2018-10-30 10:45:48 +11:00
reservations.c
reservations.h
resize.c
resize.h
slot_map.c
slot_map.h
stack_o2cb.c
stack_user.c treewide: Align function definition open/close braces 2018-03-26 11:13:09 +02:00
stackglue.c ocfs2: remove ocfs2_is_o2cb_active() 2018-11-03 10:09:37 -07:00
stackglue.h ocfs2: remove ocfs2_is_o2cb_active() 2018-11-03 10:09:37 -07:00
suballoc.c ocfs2: remove two unused functions from suballoc.c 2018-04-05 21:36:22 -07:00
suballoc.h
super.c ocfs2: add kobject for online file check 2018-04-05 21:36:22 -07:00
super.h ocfs2: remove unused declaration ocfs2_publish_get_mount_state() 2017-11-15 18:21:01 -08:00
symlink.c
symlink.h
sysfile.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
sysfile.h
uptodate.c ocfs2: remove unnecessary null pointer check before kmem_cache_destroy() 2018-04-05 21:36:22 -07:00
uptodate.h
xattr.c ocfs2: use 'osb' instead of 'OCFS2_SB()' 2018-04-05 21:36:21 -07:00
xattr.h