Sam Edwards cac190c767 ceph: fix write storm on fscrypted files ... CephFS stores file data across multiple RADOS objects. An object is the atomic unit of storage, so the writeback code must clean only folios that belong to the same object with each OSD request. CephFS also supports RAID0-style striping of file contents: if enabled, each object stores multiple unbroken "stripe units" covering different portions of the file; if disabled, a "stripe unit" is simply the whole object. The stripe unit is (usually) reported as the inode's block size. Though the writeback logic could, in principle, lock all dirty folios belonging to the same object, its current design is to lock only a single stripe unit at a time. Ever since this code was first written, it has determined this size by checking the inode's block size. However, the relatively-new fscrypt support needed to reduce the block size for encrypted inodes to the crypto block size (see 'fixes' commit), which causes an unnecessarily high number of write operations (~1024x as many, with 4MiB objects) and correspondingly degraded performance. Fix this (and clarify intent) by using i_layout.stripe_unit directly in ceph_define_write_size() so that encrypted inodes are written back with the same number of operations as if they were unencrypted. This patch depends on the preceding commit ("ceph: do not propagate page array emplacement errors as batch errors") for correctness. While it applies cleanly on its own, applying it alone will introduce a regression. This dependency is only relevant for kernels where ce80b76dd3 ("ceph: introduce ceph_process_folio_batch() method") has been applied; stable kernels without that commit are unaffected. Cc: stable@vger.kernel.org Fixes: 94af047092 ("ceph: add some fscrypt guardrails") Signed-off-by: Sam Edwards <CFSworks@gmail.com> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>		2026-02-11 17:52:50 +01:00
..
9p	9p: don't allow delegations to be set on directories	2026-01-12 10:54:47 +01:00
adfs
affs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
afs	Networking changes for 6.19.	2025-12-03 17:24:33 -08:00
autofs	vfs-6.19-rc1.fixes	2025-12-05 15:52:30 -08:00
befs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
bfs	vfs-6.19-rc1.inode	2025-12-01 09:02:34 -08:00
btrfs	for-6.19-rc8-tag	2026-02-03 10:19:58 -08:00
cachefiles	vfs-6.19-rc1.directory.locking	2025-12-01 16:13:46 -08:00
ceph	ceph: fix write storm on fscrypted files	2026-02-11 17:52:50 +01:00
coda	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
configfs	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
cramfs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
crypto	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
debugfs	debugfs: Fix memleak in debugfs_change_name().	2025-12-19 16:43:40 +01:00
devpts	convert devpts	2025-11-16 01:35:04 -05:00
dlm	net: Convert proto callbacks from sockaddr to sockaddr_unsized	2025-11-04 19:10:33 -08:00
ecryptfs	ecryptfs: Release lower parent dentry after creating dir	2025-12-24 13:58:04 +01:00
efivarfs	efivarfs: fix error propagation in efivar_entry_get()	2026-01-19 08:40:36 +01:00
efs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
erofs	erofs: fix file-backed mounts no longer working on EROFS partitions	2026-01-10 06:39:20 -10:00
exfat	exfat: fix remount failure in different process environments	2025-12-03 10:00:17 +09:00
exportfs
ext2	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
ext4	ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref	2026-01-18 11:23:10 -05:00
f2fs	f2fs-for-6.19-rc1	2025-12-09 12:06:20 +09:00
fat	There are no significant series in this small merge. Please see the	2025-12-13 20:55:12 +12:00
freevxfs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
fuse	vfs-6.19-rc8.fixes	2026-01-26 09:30:48 -08:00
gfs2	vfs-6.19-rc8.fixes	2026-01-26 09:30:48 -08:00
hfs	hfs/hfsplus updates for v6.19	2025-12-03 20:08:32 -08:00
hfsplus	hfs/hfsplus updates for v6.19	2025-12-03 20:08:32 -08:00
hostfs	Apart from the usual small churn, we have	2025-12-05 16:30:56 -08:00
hpfs	vfs-6.19-rc1.fs_header	2025-12-01 14:18:01 -08:00
hugetlbfs	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
iomap	iomap: wait for batched folios to be stable in __iomap_get_folio	2026-01-14 17:06:02 +01:00
isofs	vfs-6.19-rc1.inode	2025-12-01 09:02:34 -08:00
jbd2	jbd2: fix the inconsistency between checksum and data in memory for journal sb	2025-11-26 17:05:47 -05:00
jffs2	treewide: Update email address	2026-01-11 06:09:11 -10:00
jfs	vfs-6.19-rc1.inode	2025-12-01 09:02:34 -08:00
kernfs	fs/kernfs: null-ptr deref in simple_xattrs_free()	2025-12-23 16:14:43 +01:00
lockd	nfsd-6.19 fixes:	2025-12-30 17:56:26 -08:00
minix	vfs-6.19-rc1.minix	2025-12-01 15:22:40 -08:00
netfs	netfs: Fix early read unlock of page with EOF in middle	2025-12-24 13:30:24 +01:00
nfs	vfs-6.19-rc8.fixes	2026-01-26 09:30:48 -08:00
nfs_common	NFSD: Remove NFSERR_EAGAIN	2026-01-02 13:43:41 -05:00
nfsd	vfs-6.19-rc5.fixes	2026-01-09 05:57:57 -10:00
nilfs2	Significant patch series in this pull request:	2025-12-06 14:01:20 -08:00
nls	fs/nls: Fix inconsistency between utf8_to_utf32() and utf32_to_utf8()	2025-12-01 11:58:06 +02:00
notify	\n	2025-12-19 07:41:17 +12:00
ntfs3	Significant patch series in this merge are as follows:	2025-12-05 13:52:43 -08:00
ocfs2	There are no significant series in this small merge. Please see the	2025-12-13 20:55:12 +12:00
omfs	vfs-6.19-rc1.fs_header	2025-12-01 14:18:01 -08:00
openpromfs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
orangefs	vfs-6.19-rc1.inode	2025-12-01 09:02:34 -08:00
overlayfs	ovl: pass original credentials, not mounter credentials during create	2025-12-05 16:16:20 -08:00
proc	procfs: avoid fetching build ID while holding VMA lock	2026-02-05 14:10:00 -08:00
pstore	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
qnx4	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
qnx6	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
quota	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
ramfs	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
resctrl	Significant patch series in this merge are as follows:	2025-12-05 13:52:43 -08:00
romfs	romfs: check sb_set_blocksize() return value	2026-01-13 09:56:58 +01:00
smb	two client memory leak fixes	2026-02-03 16:20:59 -08:00
squashfs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
sysfs	sysfs: attribute_group: enable const variants of is_visible()	2025-11-26 15:16:35 +01:00
tests
tracefs	convert tracefs	2025-11-16 01:35:03 -05:00
ubifs	This pull request contains the following changes for UBI and UBIFS:	2025-12-09 08:50:27 +09:00
udf	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
ufs	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
unicode
vboxsf	vboxsf: don't allow delegations to be set on directories	2026-01-12 10:54:47 +01:00
verity	Optimize fsverity with 2-way interleaved hashing	2025-09-29 15:55:20 -07:00
xfs	xfs: fixes for v6.19-rc6	2026-01-16 09:09:41 -08:00
zonefs	vfs-6.19-rc1.inode	2025-12-01 09:02:34 -08:00
aio.c	aio: use credential guards	2025-11-04 12:36:33 +01:00
anon_inodes.c	anon_inodes: convert to FD_ADD()	2025-11-28 12:42:31 +01:00
attr.c	filelock: add struct delegated_inode	2025-11-12 09:38:34 +01:00
backing-file.c	kernel-6.19-rc1.cred	2025-12-01 13:45:41 -08:00
bad_inode.c
binfmt_elf.c	rseq: Provide and use rseq_set_ids()	2025-11-04 08:33:33 +01:00
binfmt_elf_fdpic.c
binfmt_flat.c
binfmt_misc.c	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
binfmt_script.c
bpf_fs_kfuncs.c	bpf...d_path(): constify path argument	2025-09-15 21:17:08 -04:00
buffer.c	vfs-6.19-rc1.folio	2025-12-01 10:26:38 -08:00
char_dev.c
compat_binfmt_elf.c
coredump.c	Networking changes for 6.19.	2025-12-03 17:24:33 -08:00
d_path.c
dax.c	Significant patch series in this merge are as follows:	2025-12-05 13:52:43 -08:00
dcache.c	vfs: document d_dispose_if_unused()	2026-01-16 19:15:14 +01:00
direct-io.c
drop_caches.c	Coccinelle-based conversion to use ->i_state accessors	2025-10-20 20:22:26 +02:00
eventfd.c	eventfd: convert do_eventfd() to FD_PREPARE()	2025-11-28 12:42:31 +01:00
eventpoll.c	eventpoll: convert do_epoll_create() to FD_PREPARE()	2025-11-28 12:42:32 +01:00
exec.c	A large overhaul of the restartable sequences and CID management:	2025-12-02 08:48:53 -08:00
fcntl.c	vfs: expose delegation support to userland	2025-11-12 09:38:37 +01:00
fhandle.c	fhandle: convert do_handle_open() to FD_ADD()	2025-11-28 12:42:31 +01:00
file.c	vfs-6.19-rc1.fd_prepare.fs	2025-12-01 17:32:07 -08:00
file_attr.c	\n	2025-12-19 07:41:17 +12:00
file_table.c	fs: update comment in init_file()	2025-10-07 12:48:33 +02:00
filesystems.c
fs-writeback.c	vfs-6.19-rc8.fixes	2026-01-26 09:30:48 -08:00
fs_context.c
fs_dirent.c	fs: rename fs_types.h to fs_dirent.h	2025-11-05 09:51:30 +01:00
fs_parser.c
fs_pin.c
fs_struct.c	fs: inline current_umask() and move it to fs_struct.h	2025-11-05 22:51:23 +01:00
fsopen.c
init.c	vfs: make vfs_symlink break delegations on parent dir	2025-11-12 09:38:36 +01:00
inode.c	fs: Describe @isnew parameter in ilookup5_nowait()	2025-12-24 13:33:24 +01:00
internal.h	Some filesystems use a kinda-sorta controlled dentry refcount leak to pin	2025-12-05 14:36:21 -08:00
ioctl.c
Kconfig	Summary of significant series in this pull request:	2025-10-02 18:18:33 -07:00
Kconfig.binfmt
kernel_read_file.c
libfs.c	shmem: fix recovery on rename failures	2025-12-16 00:57:29 -05:00
locks.c	vfs-6.19-rc5.fixes	2026-01-09 05:57:57 -10:00
Makefile	fs: rename fs_types.h to fs_dirent.h	2025-11-05 09:51:30 +01:00
mbcache.c
mnt_idmapping.c
mount.h	fs: use boolean to indicate anonymous mount namespace	2025-11-11 10:01:31 +01:00
mpage.c	mpage: convert do_mpage_readpage() to return void type	2025-09-21 14:22:16 -07:00
namei.c	VFS: fix __start_dirop() kernel-doc warnings	2025-12-24 13:33:24 +01:00
namespace.c	vfs-6.19-rc1.fd_prepare.fs	2025-12-01 17:32:07 -08:00
nsfs.c	vfs-6.19-rc1.fd_prepare.fs	2025-12-01 17:32:07 -08:00
open.c	vfs-6.19-rc1.fd_prepare.fs	2025-12-01 17:32:07 -08:00
pidfs.c	pidfs: protect PIDFD_GET_* ioctls() via ifdef	2026-01-06 23:08:12 +01:00
pipe.c	Summary	2025-12-05 11:15:37 -08:00
pnode.c	umount_tree(): take all victims out of propagation graph at once	2025-09-15 21:26:44 -04:00
pnode.h	umount_tree(): take all victims out of propagation graph at once	2025-09-15 21:26:44 -04:00
posix_acl.c	filelock: add struct delegated_inode	2025-11-12 09:38:34 +01:00
proc_namespace.c
read_write.c
readdir.c	readdir: require opt-in for d_type flags	2026-01-12 10:57:34 +01:00
remap_range.c
select.c	select: Convert to scoped user access	2025-11-04 08:28:34 +01:00
seq_file.c
signalfd.c	signalfd: convert do_signalfd4() to FD_ADD()	2025-11-28 12:42:32 +01:00
splice.c	fs/splice.c: trivial fix: pipes -> pipe's	2025-11-25 10:11:16 +01:00
stack.c
stat.c	constify path argument of vfs_statx_path()	2025-09-15 21:17:07 -04:00
statfs.c
super.c	vfs-6.19-rc1.fixes	2025-12-05 15:52:30 -08:00
sync.c	vfs-6.19-rc1.writeback	2025-12-01 09:20:51 -08:00
sysctls.c
timerfd.c	timerfd: convert timerfd_create() to FD_ADD()	2025-11-28 12:42:32 +01:00
userfaultfd.c	Significant patch series in this merge are as follows:	2025-12-05 13:52:43 -08:00
utimes.c	vfs-6.19-rc1.directory.delegations	2025-12-01 15:34:41 -08:00
xattr.c	filelock: add struct delegated_inode	2025-11-12 09:38:34 +01:00