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Baokun Li dc3e0f55be ext4: avoid online resizing failures due to oversized flex bg 
[ Upstream commit 5d1935ac02 ]

When we online resize an ext4 filesystem with a oversized flexbg_size,

     mkfs.ext4 -F -G 67108864 $dev -b 4096 100M
     mount $dev $dir
     resize2fs $dev 16G

the following WARN_ON is triggered:
==================================================================
WARNING: CPU: 0 PID: 427 at mm/page_alloc.c:4402 __alloc_pages+0x411/0x550
Modules linked in: sg(E)
CPU: 0 PID: 427 Comm: resize2fs Tainted: G  E  6.6.0-rc5+ #314
RIP: 0010:__alloc_pages+0x411/0x550
Call Trace:
 <TASK>
 __kmalloc_large_node+0xa2/0x200
 __kmalloc+0x16e/0x290
 ext4_resize_fs+0x481/0xd80
 __ext4_ioctl+0x1616/0x1d90
 ext4_ioctl+0x12/0x20
 __x64_sys_ioctl+0xf0/0x150
 do_syscall_64+0x3b/0x90
==================================================================

This is because flexbg_size is too large and the size of the new_group_data
array to be allocated exceeds MAX_ORDER. Currently, the minimum value of
MAX_ORDER is 8, the minimum value of PAGE_SIZE is 4096, the corresponding
maximum number of groups that can be allocated is:

 (PAGE_SIZE << MAX_ORDER) / sizeof(struct ext4_new_group_data) ≈ 21845

And the value that is down-aligned to the power of 2 is 16384. Therefore,
this value is defined as MAX_RESIZE_BG, and the number of groups added
each time does not exceed this value during resizing, and is added multiple
times to complete the online resizing. The difference is that the metadata
in a flex_bg may be more dispersed.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231023013057.2117948-4-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-02-05 20:16:49 +00:00
..
9p Bunch of small fixes: 2023-11-04 09:20:04 -10:00
adfs adfs: convert to new timestamp accessors 2023-10-18 13:26:18 +02:00
affs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
afs afs: fix the usage of read_seqbegin_or_lock() in afs_lookup_volume_rcu() 2024-02-05 20:16:47 +00:00
autofs autofs: add: new_inode check in autofs_fill_super() 2023-11-20 14:56:36 +01:00
bcachefs bcachefs: make RO snapshots actually RO 2024-01-01 11:47:07 -05:00
befs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
bfs bfs: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
btrfs btrfs: zoned: optimize hint byte for zoned allocator 2024-01-31 16:21:16 -08:00
cachefiles - Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list") 2023-08-29 14:25:26 -07:00
ceph ceph: select FS_ENCRYPTION_ALGS if FS_ENCRYPTION 2024-01-25 15:45:13 -08:00
coda coda: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
configfs configfs: convert to new timestamp accessors 2023-10-18 13:26:19 +02:00
cramfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
crypto This update includes the following changes: 2023-11-02 16:15:30 -10:00
debugfs debugfs: initialize cancellations earlier 2023-12-22 07:33:02 +01:00
devpts devpts: convert to new timestamp accessors 2023-10-18 13:26:20 +02:00
dlm dlm: use kernel_connect() and kernel_bind() 2024-01-31 16:21:00 -08:00
ecryptfs ecryptfs: Reject casefold directory inodes 2024-02-05 20:16:48 +00:00
efivarfs efivarfs: Free s_fs_info on unmount 2024-01-25 15:44:39 -08:00
efs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
erofs erofs: fix ztailpacking for subpage compressed blocks 2024-02-05 20:16:47 +00:00
exfat exfat: fix ctime is not updated 2023-11-03 22:24:11 +09:00
exportfs fs: fix build error with CONFIG_EXPORTFS=m or not defined 2023-10-28 16:16:19 +02:00
ext2 ext2: Fix ki_pos update for DIO buffered-io fallback case 2023-11-22 10:17:10 +01:00
ext4 ext4: avoid online resizing failures due to oversized flex bg 2024-02-05 20:16:49 +00:00
f2fs f2fs: fix to check return value of f2fs_recover_xattr_data 2024-01-25 15:45:05 -08:00
fat vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
freevxfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
fscache netfs, fscache: Prevent Oops in fscache_put_cache() 2024-01-31 16:21:06 -08:00
fuse fuse: disable FOPEN_PARALLEL_DIRECT_WRITES with FUSE_DIRECT_IO_ALLOW_MMAP 2023-12-04 10:19:32 +01:00
gfs2 gfs2: fix kernel BUG in gfs2_quota_cleanup 2024-01-25 15:44:43 -08:00
hfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
hfsplus vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
hostfs hostfs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
hpfs hpfs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
hugetlbfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
iomap Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
isofs isofs: convert to new timestamp accessors 2023-10-18 14:08:22 +02:00
jbd2 jbd2: fix soft lockup in journal_finish_inode_data_buffers() 2023-12-12 10:25:46 -05:00
jffs2 vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
jfs jfs: fix array-index-out-of-bounds in diNewExt 2024-02-05 20:16:47 +00:00
kernfs Revert "kernfs: convert kernfs_idr_lock to an irq safe raw spinlock" 2024-01-25 15:45:09 -08:00
lockd SUNRPC: change how svc threads are asked to exit. 2023-10-16 12:44:04 -04:00
minix minix: convert to new timestamp accessors 2023-10-18 14:08:23 +02:00
netfs netfs: Only call folio_start_fscache() one time for each folio 2023-09-18 12:03:46 -07:00
nfs pNFS: Fix the pnfs block driver's calculation of layoutget size 2024-01-25 15:44:44 -08:00
nfs_common NFSv4.2: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
nfsd nfsd: fix RELEASE_LOCKOWNER 2024-01-31 16:21:11 -08:00
nilfs2 nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage() 2023-12-06 16:12:50 -08:00
nls nls: Hide new NLS_UCS2_UTILS 2023-08-31 12:07:34 -05:00
notify vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ntfs vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ntfs3 vfs-6.7.fsid 2023-11-07 12:11:26 -08:00
ocfs2 As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
omfs omfs: convert to new timestamp accessors 2023-10-18 14:08:25 +02:00
openpromfs openpromfs: convert to new timestamp accessors 2023-10-18 14:08:25 +02:00
orangefs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
overlayfs ovl: mark xwhiteouts directory with overlay.opaque='x' 2024-01-31 16:21:11 -08:00
proc sysctl: Fix out of bounds access for empty sysctl registers 2024-02-05 20:16:48 +00:00
pstore pstore/ram: Fix crash when setting number of cpus to an odd number 2024-02-05 20:16:47 +00:00
qnx4 qnx4: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
qnx6 qnx6: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
quota Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
ramfs ramfs: convert to new timestamp accessors 2023-10-18 14:08:26 +02:00
reiserfs Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
romfs vfs-6.7.ctime 2023-10-30 09:47:13 -10:00
smb cifs: fix in logging in cifs_chan_update_iface 2024-02-05 20:16:48 +00:00
squashfs squashfs: squashfs_read_data need to check if the length is 0 2023-12-06 16:12:45 -08:00
sysfs kernfs: sysfs: support custom llseek method for sysfs entries 2023-10-05 13:42:11 +02:00
sysv sysv: convert to new timestamp accessors 2023-10-18 14:08:28 +02:00
tracefs eventfs: Fix bitwise fields for "is_events" 2024-01-02 15:20:44 -05:00
ubifs ubifs: ubifs_symlink: Fix memleak of inode->i_link in error path 2024-01-31 16:21:02 -08:00
udf \n 2023-11-02 08:19:51 -10:00
ufs fix ufs_get_locked_folio() breakage 2023-12-13 11:14:09 -05:00
unicode unicode: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:54 -07:00
vboxsf vboxsf: convert to new timestamp accessors 2023-10-18 14:08:29 +02:00
verity fsverity: skip PKCS#7 parser when keyring is empty 2023-08-20 10:33:43 -07:00
xfs xfs: read only mounts with fsopen mount API are busted 2024-01-31 16:21:12 -08:00
zonefs zonefs: convert to new timestamp accessors 2023-10-18 14:08:29 +02:00
aio.c aio: Annotate struct kioctx_table with __counted_by 2023-09-20 14:22:01 +02:00
anon_inodes.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
attr.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
bad_inode.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
binfmt_elf.c binfmt_elf: Only report padzero() errors when PROT_WRITE 2023-10-03 19:48:44 -07:00
binfmt_elf_fdpic.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_elf_test.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
binfmt_flat.c binfmt_flat: Remove shared library support 2022-04-22 10:57:18 -07:00
binfmt_misc.c execve updates for v6.7-rc1 2023-10-30 19:28:19 -10:00
binfmt_script.c Merge branch 'akpm' (patches from Andrew) 2020-06-04 19:18:29 -07:00
buffer.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
char_dev.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
compat_binfmt_elf.c binfmt_elf: Introduce KUnit test 2022-03-03 20:38:56 -08:00
coredump.c v6.5/vfs.misc 2023-06-26 09:50:21 -07:00
d_path.c fs: d_path: include internal.h 2023-05-17 09:16:59 +02:00
dax.c mm: convert DAX lock/unlock page to lock/unlock folio 2023-10-04 10:32:20 -07:00
dcache.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
direct-io.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
drop_caches.c fs: drop_caches: draining pages before dropping caches 2023-08-18 10:12:11 -07:00
eventfd.c eventfd: prevent underflow for eventfd semaphores 2023-07-11 11:41:34 +02:00
eventpoll.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
exec.c exec: Fix error handling in begin_new_exec() 2024-01-31 16:21:11 -08:00
fcntl.c treewide: mark stuff as __ro_after_init 2023-10-18 14:43:23 -07:00
fhandle.c exportfs: add helpers to check if filesystem can encode/decode file handles 2023-10-24 17:57:45 +02:00
file.c file, i915: fix file reference for mmap_singleton() 2023-10-25 22:17:04 +02:00
file_table.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
filesystems.c fs: simplify get_filesystem_list / get_all_fs_names 2021-08-23 01:25:40 -04:00
fs-writeback.c vfs-6.7.misc 2023-10-30 09:14:19 -10:00
fs_context.c fs: factor out vfs_parse_monolithic_sep() helper 2023-10-12 18:53:36 +03:00
fs_parser.c ext4: journal_path mount options should follow links 2022-12-01 10:46:54 -05:00
fs_pin.c switch the remnants of releasing the mountpoint away from fs_pin 2019-07-16 22:52:37 -04:00
fs_struct.c kill do_each_thread() 2023-08-21 13:46:25 -07:00
fs_types.c fs: common implementation of file type 2019-01-21 17:48:13 +01:00
fsopen.c fsconfig: ensure that dirfd is set to aux 2023-09-22 14:09:06 +02:00
init.c fs: add a new SB_I_NOUMASK flag 2023-10-19 11:02:47 +02:00
inode.c filemap: add a per-mapping stable writes flag 2023-11-20 15:05:18 +01:00
internal.h fs: store real path instead of fake path in backing file f_path 2023-10-19 11:03:15 +02:00
ioctl.c lsm: new security_file_ioctl_compat() hook 2024-01-31 16:21:00 -08:00
Kconfig mm/hugetlb: have CONFIG_HUGETLB_PAGE select CONFIG_XARRAY_MULTI 2023-12-06 16:12:49 -08:00
Kconfig.binfmt riscv: support the elf-fdpic binfmt loader 2023-08-23 14:17:43 -07:00
kernel_read_file.c fs: Fix kernel-doc warnings 2023-08-19 12:12:12 +02:00
libfs.c libfs: getdents() should return 0 after reaching EOD 2023-11-20 15:34:22 +01:00
locks.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
Makefile bcachefs: Initial commit 2023-10-22 17:08:07 -04:00
mbcache.c mbcache: dynamically allocate the mbcache shrinker 2023-10-04 10:32:25 -07:00
mnt_idmapping.c fs: export mnt_idmap_get/mnt_idmap_put 2023-11-03 23:28:33 +01:00
mount.h switch try_to_unlazy_next() to __legitimize_mnt() 2022-07-05 16:18:21 -04:00
mpage.c buffer: remove folio_create_empty_buffers() 2023-10-25 16:47:10 -07:00
namei.c rename(): fix the locking of subdirectories 2024-01-31 16:21:03 -08:00
namespace.c fs: indicate request originates from old mount API 2024-01-25 15:44:42 -08:00
nsfs.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
open.c cred: get rid of CONFIG_DEBUG_CREDENTIALS 2023-12-15 14:19:48 -08:00
pipe.c pipe: wakeup wr_wait after setting max_usage 2024-01-31 16:20:53 -08:00
pnode.c fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
pnode.h fs: allow to mount beneath top mount 2023-05-19 04:30:22 +02:00
posix_acl.c fs: convert to ctime accessor functions 2023-07-13 10:28:04 +02:00
proc_namespace.c tty, proc, kernfs, random: Use copy_splice_read() 2023-05-24 08:42:16 -06:00
read_write.c fs: Fix one kernel-doc comment 2023-08-15 08:32:45 +02:00
readdir.c vfs: get rid of old '->iterate' directory operation 2023-08-06 15:08:35 +02:00
remap_range.c fs: use UB-safe check for signed addition overflow in remap_verify_area 2023-05-24 11:03:59 +02:00
select.c select: Fix indefinitely sleeping task in poll_schedule_timeout() 2022-01-11 09:03:05 -08:00
seq_file.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
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 - Some swap cleanups from Ma Wupeng ("fix WARN_ON in add_to_avail_list") 2023-08-29 14:25:26 -07:00
stack.c fs: convert core infrastructure to new timestamp accessors 2023-10-18 13:26:15 +02:00
stat.c fs: Pass AT_GETATTR_NOSEC flag to getattr interface function 2023-11-18 14:54:07 +01:00
statfs.c statfs: enforce statfs[64] structure initialization 2023-05-17 15:20:17 +02:00
super.c overlayfs update for 6.7-rc1 2023-11-07 11:46:31 -08:00
sync.c riscv: compat: syscall: Add compat_sys_call_table implementation 2022-04-26 13:36:25 -07:00
sysctls.c sysctl: Refactor base paths registrations 2023-05-23 21:43:26 -07:00
timerfd.c timerfd: Provide timerfd_resume() 2021-08-10 17:57:22 +02:00
userfaultfd.c As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
utimes.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
xattr.c xattr: make the xattr array itself const 2023-10-09 16:24:16 +02:00