github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-04 12:35:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph
d2e1b84c51
linux/fs
History
Reinette Chatre d2e1b84c51 fs/resctrl: Eliminate false positive lockdep warning when reading SNC counters 
Running resctrl_tests on an SNC-2 system with lockdep debugging enabled
triggers several warnings with following trace:

  WARNING: CPU: 0 PID: 1914 at kernel/cpu.c:528 lockdep_assert_cpus_held
  ...
  Call Trace:
  __mon_event_count
  ? __lock_acquire
  ? __pfx___mon_event_count
  mon_event_count
  ? __pfx_smp_mon_event_count
  smp_mon_event_count
  smp_call_on_cpu_callback

get_cpu_cacheinfo_level() called from __mon_event_count() requires CPU hotplug
lock to be held. The hotplug lock is indeed held during this time, as
confirmed by the lockdep_assert_cpus_held() within mon_event_read() that calls
mon_event_count() via IPI, but the lockdep tracking is not able to follow the
IPI.

Fresh CPU cache information via get_cpu_cacheinfo_level() from
__mon_event_count() was added to support the fix for the issue where resctrl
inappropriately maintained links to L3 cache information that will be stale in
the case when the associated CPU goes offline.

Keep the cacheinfo ID in struct rdt_mon_domain to ensure that resctrl does not
maintain stale cache information while CPUs can go offline. Return to using
a pointer to the L3 cache information (struct cacheinfo) in struct rmid_read,
rmid_read::ci. Initialize rmid_read::ci before the IPI where it is used. CPU
hotplug lock is held across rmid_read::ci initialization and use to ensure
that it points to accurate cache information.

Fixes: 594902c986 ("x86,fs/resctrl: Remove inappropriate references to cacheinfo in the resctrl subsystem")
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
2025-09-09 12:43:36 +02:00
..
9p vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
adfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
affs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
afs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
autofs new helper: set_default_d_op() 2025-06-10 22:21:16 -04:00
bcachefs vfs-6.17-rc1.fileattr 2025-07-28 15:24:14 -07:00
befs
bfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
btrfs for-6.17-rc4-tag 2025-09-02 13:13:22 -07:00
cachefiles vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00
ceph Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
coda vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
configfs configfs: use DCACHE_DONTCACHE 2025-06-11 13:41:05 -04:00
cramfs mm: remove callers of pfn_t functionality 2025-07-09 22:42:19 -07:00
crypto fscrypt: Remove gfp_t argument from fscrypt_encrypt_block_inplace() 2025-07-10 12:33:13 -07:00
debugfs debugfs: fix mount options not being applied 2025-08-17 12:22:25 +02:00
devpts devpts, sunrpc, hostfs: don't bother with ->d_op 2025-06-11 13:40:04 -04:00
dlm treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
ecryptfs vfs-6.17-rc1.fileattr 2025-07-28 15:24:14 -07:00
efivarfs efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare 2025-08-28 08:39:49 +02:00
efs
erofs erofs: fix block count report when 48-bit layout is on 2025-08-11 06:31:19 +08:00
exfat exfat: add cluster chain loop check for dir 2025-08-01 08:34:23 +09:00
exportfs exportfs: use lookup_one_unlocked() 2025-06-11 13:44:15 +02:00
ext2 \n 2025-07-28 16:16:09 -07:00
ext4 Ext4 bug fixes and cleanups for 6.17-rc3, including most notably: 2025-08-18 09:01:00 -07:00
f2fs f2fs-for-6.17-rc1 2025-08-04 16:27:21 -07:00
fat Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
freevxfs
fuse fuse: keep inode->i_blkbits constant 2025-08-11 14:51:50 +02:00
gfs2 vfs-6.17-rc1.iomap 2025-07-28 16:09:03 -07:00
hfs hfs/hfsplus updates for v6.17 2025-07-28 16:17:44 -07:00
hfsplus hfs/hfsplus updates for v6.17 2025-07-28 16:17:44 -07:00
hostfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
hpfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
hugetlbfs Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
iomap iomap: Fix broken data integrity guarantees for O_SYNC writes 2025-08-11 14:51:49 +02:00
isofs Current exclusion rules for ->d_flags stores are rather unpleasant. 2025-07-28 09:17:57 -07:00
jbd2 jbd2: prevent softlockup in jbd2_log_do_checkpoint() 2025-08-13 14:24:14 -04:00
jffs2 vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
jfs Fixes and cleanups for JFS filesystem 2025-07-31 10:27:11 -07:00
kernfs kernfs: don't fail listing extended attributes 2025-08-19 13:51:28 +02:00
lockd
minix vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
netfs netfs: Fix unbuffered write error handling 2025-08-15 15:56:49 +02:00
nfs NFS: Fix a race when updating an existing write 2025-08-19 11:16:02 -07:00
nfs_common NFS/localio: nfs_uuid_put() fix the wake up after unlinking the file 2025-08-05 16:45:40 -07:00
nfsd nfsd-6.17 fixes: 2025-08-11 07:38:55 -07:00
nilfs2 vfs-6.17-rc1.fileattr 2025-07-28 15:24:14 -07:00
nls
notify \n 2025-07-31 10:31:00 -07:00
ntfs3 vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
ocfs2 ocfs2: prevent release journal inode after journal shutdown 2025-08-27 22:45:41 -07:00
omfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
openpromfs
orangefs orangefs: fixes for string handling in debugfs and sysfs 2025-07-31 10:22:48 -07:00
overlayfs ovl: fix possible double unlink 2025-08-18 13:16:49 +02:00
proc proc: fix missing pde_set_flags() for net proc files 2025-08-27 22:45:44 -07:00
pstore pstore: switch to locked_recursive_removal() 2025-07-02 22:36:51 -04:00
qnx4
qnx6
quota VFS: rename lookup_one_len family to lookup_noperm and remove permission check 2025-04-08 11:24:36 +02:00
ramfs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
resctrl fs/resctrl: Eliminate false positive lockdep warning when reading SNC counters 2025-09-09 12:43:36 +02:00
romfs fs: replace mmap hook with .mmap_prepare for simple mappings 2025-06-19 13:56:59 +02:00
smb five smb3 client fixes 2025-09-05 11:14:23 -07:00
squashfs squashfs: fix memory leak in squashfs_fill_super 2025-08-19 16:35:53 -07:00
sysfs sysfs: constify internal references to 'struct bin_attribute' 2025-06-17 10:44:09 +02:00
tests
tracefs Massage rpc_pipefs to use saner primitives and clean up the 2025-07-28 09:56:09 -07:00
ubifs This pull request contains the following changes for UBI and UBIFS: 2025-07-31 10:08:44 -07:00
udf \n 2025-07-28 16:16:09 -07:00
ufs vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
unicode
vboxsf vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
verity fsverity: Switch from crypto_shash to SHA-2 library 2025-07-14 11:29:32 -07:00
xfs xfs: do not propagate ENODATA disk errors into xattr code 2025-08-26 11:00:33 +02:00
zonefs zonefs changes for 6.17-rc1 2025-07-28 17:06:51 -07:00
aio.c fs: replace mmap hook with .mmap_prepare for simple mappings 2025-06-19 13:56:59 +02:00
anon_inodes.c module: Rename EXPORT_SYMBOL_GPL_FOR_MODULES to EXPORT_SYMBOL_FOR_MODULES 2025-08-11 16:16:36 +02:00
attr.c docs/vfs: update references to i_mutex to i_rwsem 2025-06-23 12:17:33 +02:00
backing-file.c vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
bad_inode.c
binfmt_elf_fdpic.c execve updates for v6.17 2025-07-28 17:11:40 -07:00
binfmt_elf.c execve updates for v6.17 2025-07-28 17:11:40 -07:00
binfmt_flat.c
binfmt_misc.c binfmt_misc: switch to locked_recursive_removal() 2025-07-02 22:36:51 -04:00
binfmt_script.c
bpf_fs_kfuncs.c bpf: Introduce bpf_cgroup_read_xattr to read xattr of cgroup's node 2025-07-02 14:18:20 +02:00
buffer.c fs/buffer: fix use-after-free when call bh_read() helper 2025-08-19 13:51:28 +02:00
char_dev.c
compat_binfmt_elf.c
coredump.c coredump: Fix return value in coredump_parse() 2025-08-19 13:51:28 +02:00
d_path.c fold fs_struct->{lock,seq} into a seqlock 2025-07-08 10:25:19 +02:00
dax.c fs/dax: Reject IOCB_ATOMIC in dax_iomap_rw() 2025-08-11 14:03:38 +02:00
dcache.c vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00
direct-io.c Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
drop_caches.c
eventfd.c
eventpoll.c vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00
exec.c Summary of significant series in this pull request: 2025-07-31 14:57:54 -07:00
fcntl.c
fhandle.c fhandle: do_handle_open() should get FD with user flags 2025-08-15 15:46:57 +02:00
file_attr.c fs: tighten a sanity check in file_attr_to_fileattr() 2025-07-16 10:22:01 +02:00
file_table.c \n 2025-07-31 10:31:00 -07:00
file.c vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00
filesystems.c fs/filesystems: Fix potential unsigned integer underflow in fs_name() 2025-04-14 13:05:59 +02:00
fs_context.c fs/fs_context: Mark an unlikely if condition with unlikely() in vfs_parse_monolithic_sep() 2025-04-14 13:05:59 +02:00
fs_parser.c fs/fs_parse: Remove unused and problematic validate_constant_table() 2025-04-21 10:27:59 +02:00
fs_pin.c
fs_struct.c fold fs_struct->{lock,seq} into a seqlock 2025-07-08 10:25:19 +02:00
fs_types.c
fs-writeback.c fs: writeback: fix use-after-free in __mark_inode_dirty() 2025-08-11 14:51:45 +02:00
fsopen.c
init.c
inode.c vfs: Remove unnecessary list_for_each_entry_safe() from evict_inodes() 2025-07-10 09:37:32 +02:00
internal.h vfs-6.17-rc1.pidfs 2025-07-28 14:10:15 -07:00
ioctl.c fs: split fileattr related helpers into separate file 2025-07-01 22:44:22 +02:00
Kconfig fs/Kconfig: enable HUGETLBFS only if ARCH_SUPPORTS_HUGETLBFS 2025-07-24 19:12:38 -07:00
Kconfig.binfmt
kernel_read_file.c
libfs.c vfs-6.17-rc1.pidfs 2025-07-28 14:10:15 -07:00
locks.c docs/vfs: update references to i_mutex to i_rwsem 2025-06-23 12:17:33 +02:00
Makefile fs: split fileattr related helpers into separate file 2025-07-01 22:44:22 +02:00
mbcache.c
mnt_idmapping.c
mount.h copy_tree(): don't link the mounts via mnt_list 2025-06-29 19:03:37 -04:00
mpage.c fs: use writeback_iter directly in mpage_writepages 2025-05-09 12:37:48 +02:00
namei.c vfs-6.17-rc1.pidfs 2025-07-28 14:10:15 -07:00
namespace.c fixes for several recent mount-related regressions 2025-08-19 10:12:10 -07:00
nsfs.c
open.c \n 2025-07-31 10:31:00 -07:00
pidfs.c pidfs: Fix memory leak in pidfd_info() 2025-08-15 16:10:46 +02:00
pipe.c fs/pipe: set FMODE_NOWAIT in create_pipe_files() 2025-06-10 13:16:19 +02:00
pnode.c change_mnt_propagation(): calculate propagation source only if we'll need it 2025-08-19 12:05:59 -04:00
pnode.h get rid of CL_SHARE_TO_SLAVE 2025-06-29 19:03:46 -04:00
posix_acl.c
proc_namespace.c ->mnt_devname is never NULL 2025-05-23 14:20:44 +02:00
read_write.c vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
readdir.c readdir: supply dir_context.count as readdir buffer size hint 2025-05-29 12:31:23 +02:00
remap_range.c
select.c fs: annotate suspected data race between poll_schedule_timeout() and pollwake() 2025-06-23 12:36:51 +02:00
seq_file.c
signalfd.c
splice.c netfs: Fix unbuffered write error handling 2025-08-15 15:56:49 +02:00
stack.c docs/vfs: update references to i_mutex to i_rwsem 2025-06-23 12:17:33 +02:00
stat.c xfs: New code for 6.16 2025-05-26 12:56:01 -07:00
statfs.c
super.c vfs-6.17-rc1.super 2025-07-28 15:50:15 -07:00
sync.c
sysctls.c
timerfd.c A treewide hrtimer timer cleanup 2025-03-25 10:54:15 -07:00
userfaultfd.c mm/mremap: use an explicit uffd failure path for mremap 2025-07-24 19:12:29 -07:00
utimes.c
xattr.c vfs-6.17-rc1.misc 2025-07-28 11:22:56 -07:00