mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-18 08:35:03 +00:00
Code Issues Releases Wiki Activity
linux-stable/fs
History
Ojaswin Mujoo 077d0c2c78 ext4: make mb_optimize_scan performance mount option work with extents 
Currently mb_optimize_scan scan feature which improves filesystem
performance heavily (when FS is fragmented), seems to be not working
with files with extents (ext4 by default has files with extents).

This patch fixes that and makes mb_optimize_scan feature work
for files with extents.

Below are some performance numbers obtained when allocating a 10M and 100M
file with and w/o this patch on a filesytem with no 1M contiguous block.

<perf numbers>
===============
Workload: dd if=/dev/urandom of=test conv=fsync bs=1M count=10/100

Time taken
=====================================================
no.     Size   without-patch     with-patch    Diff(%)
1       10M      0m8.401s         0m5.623s     33.06%
2       100M     1m40.465s        1m14.737s    25.6%

<debug stats>
=============
w/o patch:
  mballoc:
    reqs: 17056
    success: 11407
    groups_scanned: 13643
    cr0_stats:
            hits: 37
            groups_considered: 9472
            useless_loops: 36
            bad_suggestions: 0
    cr1_stats:
            hits: 11418
            groups_considered: 908560
            useless_loops: 1894
            bad_suggestions: 0
    cr2_stats:
            hits: 1873
            groups_considered: 6913
            useless_loops: 21
    cr3_stats:
            hits: 21
            groups_considered: 5040
            useless_loops: 21
    extents_scanned: 417364
            goal_hits: 3707
            2^n_hits: 37
            breaks: 1873
            lost: 0
    buddies_generated: 239/240
    buddies_time_used: 651080
    preallocated: 705
    discarded: 478

with patch:
  mballoc:
    reqs: 12768
    success: 11305
    groups_scanned: 12768
    cr0_stats:
            hits: 1
            groups_considered: 18
            useless_loops: 0
            bad_suggestions: 0
    cr1_stats:
            hits: 5829
            groups_considered: 50626
            useless_loops: 0
            bad_suggestions: 0
    cr2_stats:
            hits: 6938
            groups_considered: 580363
            useless_loops: 0
    cr3_stats:
            hits: 0
            groups_considered: 0
            useless_loops: 0
    extents_scanned: 309059
            goal_hits: 0
            2^n_hits: 1
            breaks: 1463
            lost: 0
    buddies_generated: 239/240
    buddies_time_used: 791392
    preallocated: 673
    discarded: 446

Fixes: 196e402 (ext4: improve cr 0 / cr 1 group scanning)
Cc: stable@kernel.org
Reported-by: Geetika Moolchandani <Geetika.Moolchandani1@ibm.com>
Reported-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Suggested-by: Ritesh Harjani <riteshh@linux.ibm.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/fc9a48f7f8dcfc83891a8b21f6dd8cdf056ed810.1646732698.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2022-03-12 20:54:21 -05:00
..
9p Revert "fs/9p: search open fids first" 2022-01-30 22:13:37 +09:00
adfs fs/adfs: remove unneeded variable make code cleaner 2022-01-20 08:52:55 +02:00
affs
afs proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
autofs
befs
bfs
btrfs for-5.17-rc4-tag 2022-02-15 09:14:05 -08:00
cachefiles netfs, cachefiles: Add a method to query presence of data in the cache 2022-02-01 10:29:18 -06:00
ceph ceph: set pool_ns in new inode layout for async creates 2022-01-26 20:17:50 +01:00
cifs cifs: fix confusing unneeded warning message on smb2.1 and earlier 2022-02-16 17:16:49 -06:00
coda coda: bump module version to 7.2 2021-11-09 10:02:51 -08:00
configfs fsnotify: fix fsnotify hooks in pseudo filesystems 2022-01-24 14:17:02 +01:00
cramfs
crypto
debugfs debugfs: lockdown: Allow reading debugfs files that are not world readable 2022-01-06 15:47:41 +01:00
devpts fsnotify: fix fsnotify hooks in pseudo filesystems 2022-01-24 14:17:02 +01:00
dlm driver core changes for 5.17-rc1 2022-01-12 11:11:34 -08:00
ecryptfs fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
efivarfs
efs
erofs erofs: fix small compressed files inlining 2022-02-04 12:37:12 +08:00
exfat exfat: fix missing REQ_SYNC in exfat_update_bhs() 2022-01-10 11:00:04 +09:00
exportfs
ext2 fsdax: shift partition offset handling into the file systems 2021-12-04 08:58:54 -08:00
ext4 ext4: make mb_optimize_scan performance mount option work with extents 2022-03-12 20:54:21 -05:00
f2fs Fix from Christoph Hellwig merging the CONFIG_UNICODE_UTF8_DATA into the 2022-02-01 11:13:24 -08:00
fat FAT: use io_schedule_timeout() instead of congestion_wait() 2022-01-20 08:52:54 +02:00
freevxfs
fscache fscache: Fix the volume collision wait condition 2022-01-21 21:36:28 +00:00
fuse virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00
gfs2 gfs2 fixes: 2022-02-11 11:36:32 -08:00
hfs Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
hfsplus hfsplus: use struct_group_attr() for memcpy() region 2022-01-20 08:52:54 +02:00
hostfs hostfs: Fix writeback of dirty pages 2021-12-21 21:44:27 +01:00
hpfs
hugetlbfs hugetlbfs: fix off-by-one error in hugetlb_vmdelete_list() 2022-01-15 16:30:30 +02:00
iomap xfs, iomap: limit individual ioend chain lengths in writeback 2022-01-26 09:19:20 -08:00
isofs
jbd2 jbd2: remove CONFIG_JBD2_DEBUG to update t_max_wait 2022-02-25 21:28:58 -05:00
jffs2 Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
jfs Just one JFS patch 2021-11-03 09:23:25 -07:00
kernfs kernfs: prevent early freeing of root node 2021-12-03 14:36:21 +01:00
ksmbd ksmbd: add support for key exchange 2022-02-04 00:12:22 -06:00
lockd Notable bug fixes: 2022-02-02 10:14:31 -08:00
minix
netfs netfs: Make ops->init_rreq() optional 2022-01-21 21:36:28 +00:00
nfs NFS: Do not report writeback errors in nfs_getattr() 2022-02-16 15:15:22 -05:00
nfs_common
nfsd Notable bug fixes: 2022-02-09 09:56:57 -08:00
nilfs2 Merge branch 'akpm' (patches from Andrew) 2022-01-20 10:41:01 +02:00
nls
notify fanotify: Fix stale file descriptor in copy_event_to_user() 2022-02-01 12:52:07 +01:00
ntfs fs/ntfs/attrib.c: fix one kernel-doc comment 2022-01-15 16:30:24 +02:00
ntfs3 mm: remove cleancache 2022-01-22 08:33:38 +02:00
ocfs2 ocfs2: fix a deadlock when commit trans 2022-01-30 09:56:58 +02:00
omfs
openpromfs
orangefs orangefs: Fix the size of a memory allocation in orangefs_bufmap_alloc() 2021-12-31 14:37:43 -05:00
overlayfs overlayfs fixes for 5.17-rc3 2022-02-01 11:23:02 -08:00
proc fs/proc: task_mmu.c: don't read mapcount for migration entry 2022-02-11 17:55:00 -08:00
pstore pstore update for v5.17-rc1 2022-01-10 11:48:37 -08:00
qnx4
qnx6
quota quota: make dquot_quota_sync return errors from ->sync_fs 2022-01-30 08:59:47 -08:00
ramfs Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
reiserfs reiserfs: don't use congestion_wait() 2021-11-18 11:52:22 +01:00
romfs
smbfs_common smb3: add new defines from protocol specification 2022-01-18 16:50:47 -06:00
squashfs squashfs: provide backing_dev_info in order to disable read-ahead 2022-01-15 16:30:24 +02:00
sysfs
sysv sysv: use BUILD_BUG_ON instead of runtime check 2021-11-09 10:02:52 -08:00
tracefs Tracing updates for 5.17: 2022-01-16 10:15:32 +02:00
ubifs ubifs: read-only if LEB may always be taken in ubifs_garbage_collect 2021-12-23 22:30:38 +01:00
udf udf: Restore i_lenAlloc when inode expansion fails 2022-01-24 14:45:02 +01:00
ufs
unicode Fix from Christoph Hellwig merging the CONFIG_UNICODE_UTF8_DATA into the 2022-02-01 11:13:24 -08:00
vboxsf
verity
xfs Fixes for 5.17-rc3: 2022-02-05 09:21:55 -08:00
zonefs zonefs: add MODULE_ALIAS_FS 2021-12-17 16:56:35 +09:00
aio.c aio: move aio sysctl to aio.c 2022-01-22 08:33:34 +02:00
anon_inodes.c
attr.c fs: handle circular mappings correctly 2021-11-17 09:26:09 +01:00
bad_inode.c
binfmt_aout.c
binfmt_elf.c fs/binfmt_elf: fix PT_LOAD p_align values for loaders 2022-02-11 17:55:00 -08:00
binfmt_elf_fdpic.c
binfmt_flat.c
binfmt_misc.c Fix regression due to "fs: move binfmt_misc sysctl to its own file" 2022-02-09 09:50:02 -08:00
binfmt_script.c
buffer.c fs/buffer: Convert __block_write_begin_int() to take a folio 2021-12-16 15:49:51 -05:00
char_dev.c
compat_binfmt_elf.c
coredump.c fs/coredump: move coredump sysctls into its own file 2022-01-22 08:33:36 +02:00
d_path.c d_path: fix Kernel doc validator complaining 2021-11-06 13:30:32 -07:00
dax.c dax: remove the copy_from_iter and copy_to_iter methods 2021-12-18 08:04:53 -08:00
dcache.c fs: move dcache sysctls to its own file 2022-01-22 08:33:36 +02:00
direct-io.c
drop_caches.c
eventfd.c
eventpoll.c eventpoll: simplify sysctl declaration with register_sysctl() 2022-01-22 08:33:35 +02:00
exec.c fs/coredump: move coredump sysctls into its own file 2022-01-22 08:33:36 +02:00
fcntl.c
fhandle.c
file.c fget: clarify and improve __fget_files() implementation 2021-12-13 10:55:30 -08:00
file_table.c fs/file_table: fix adding missing kmemleak_not_leak() 2022-02-17 10:23:19 -08:00
filesystems.c
fs-writeback.c fscache rewrite 2022-01-12 13:45:12 -08:00
fs_context.c vfs: fs_context: fix up param length parsing in legacy_parse_param 2022-01-18 09:23:19 +02:00
fs_parser.c fs_parse: allow parameter value to be empty 2021-12-09 14:09:36 -05:00
fs_pin.c
fs_struct.c
fs_types.c
fsopen.c
init.c
inode.c fs: move inode sysctls to its own file 2022-01-22 08:33:35 +02:00
internal.h fs/buffer: Convert __block_write_begin_int() to take a folio 2021-12-16 15:49:51 -05:00
io-wq.c io_uring-5.17-2022-01-21 2022-01-21 16:07:21 +02:00
io-wq.h Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
io_uring.c mm: io_uring: allow oom-killer from io_uring_setup 2022-02-07 08:44:01 -07:00
ioctl.c fs/ioctl: remove unnecessary __user annotation 2022-01-15 16:30:25 +02:00
Kconfig ksmbd: add support for key exchange 2022-02-04 00:12:22 -06:00
Kconfig.binfmt
kernel_read_file.c
libfs.c unicode: clean up the Kconfig symbol confusion 2022-01-20 19:57:24 -05:00
locks.c fs: move locking sysctls where they are used 2022-01-22 08:33:36 +02:00
Makefile Fix from Christoph Hellwig merging the CONFIG_UNICODE_UTF8_DATA into the 2022-02-01 11:13:24 -08:00
mbcache.c
mount.h
mpage.c mm: remove cleancache 2022-01-22 08:33:38 +02:00
namei.c \n 2022-01-28 17:51:31 +02:00
namespace.c fs: add kernel doc for mnt_{hold,unhold}_writers() 2022-02-14 08:35:32 +01:00
no-block.c
nsfs.c
open.c fs: support mapped mounts of mapped filesystems 2021-12-05 10:28:57 +01:00
pipe.c fs: move pipe sysctls to is own file 2022-01-22 08:33:36 +02:00
pnode.c
pnode.h
posix_acl.c fs: support mapped mounts of mapped filesystems 2021-12-05 10:28:57 +01:00
proc_namespace.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
read_write.c
readdir.c
remap_range.c fs: Convert vfs_dedupe_file_range_compare to folios 2022-01-08 00:28:41 -05:00
select.c select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
seq_file.c seq_file: move seq_escape() to a header 2021-11-09 10:02:52 -08:00
signalfd.c Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
splice.c
stack.c
stat.c
statfs.c
super.c vfs: make freeze_super abort when sync_filesystem returns error 2022-01-30 08:59:47 -08:00
sync.c vfs: make sync_filesystem return errors from ->sync_fs 2022-01-30 08:59:47 -08:00
sysctls.c fs: move namespace sysctls and declare fs base directory 2022-01-22 08:33:36 +02:00
timerfd.c
userfaultfd.c mm: move anon_vma declarations to linux/mm_inline.h 2022-01-15 16:30:27 +02:00
utimes.c
xattr.c