Commit e406d57b authored Oct 02, 2025 by Linus Torvalds

Merge tag 'mm-nonmm-stable-2025-10-02-15-29' of...

Merge tag 'mm-nonmm-stable-2025-10-02-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - "ida: Remove the ida_simple_xxx() API" from Christophe Jaillet
   completes the removal of this legacy IDR API

 - "panic: introduce panic status function family" from Jinchao Wang
   provides a number of cleanups to the panic code and its various
   helpers, which were rather ad-hoc and scattered all over the place

 - "tools/delaytop: implement real-time keyboard interaction support"
   from Fan Yu adds a few nice user-facing usability changes to the
   delaytop monitoring tool

 - "efi: Fix EFI boot with kexec handover (KHO)" from Evangelos
   Petrongonas fixes a panic which was happening with the combination of
   EFI and KHO

 - "Squashfs: performance improvement and a sanity check" from Phillip
   Lougher teaches squashfs's lseek() about SEEK_DATA/SEEK_HOLE. A mere
   150x speedup was measured for a well-chosen microbenchmark

 - plus another 50-odd singleton patches all over the place

* tag 'mm-nonmm-stable-2025-10-02-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (75 commits)
  Squashfs: reject negative file sizes in squashfs_read_inode()
  kallsyms: use kmalloc_array() instead of kmalloc()
  MAINTAINERS: update Sibi Sankar's email address
  Squashfs: add SEEK_DATA/SEEK_HOLE support
  Squashfs: add additional inode sanity checking
  lib/genalloc: fix device leak in of_gen_pool_get()
  panic: remove CONFIG_PANIC_ON_OOPS_VALUE
  ocfs2: fix double free in user_cluster_connect()
  checkpatch: suppress strscpy warnings for userspace tools
  cramfs: fix incorrect physical page address calculation
  kernel: prevent prctl(PR_SET_PDEATHSIG) from racing with parent process exit
  Squashfs: fix uninit-value in squashfs_get_parent
  kho: only fill kimage if KHO is finalized
  ocfs2: avoid extra calls to strlen() after ocfs2_sprintf_system_inode_name()
  kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
  sched/task.h: fix the wrong comment on task_lock() nesting with tasklist_lock
  coccinelle: platform_no_drv_owner: handle also built-in drivers
  coccinelle: of_table: handle SPI device ID tables
  lib/decompress: use designated initializers for struct compress_format
  efi: support booting with kexec handover (KHO)
  ...

parents 8804d970 9f1c14c1

.mailmap

+2 −1

Original line number	Diff line number	Diff line
		@@ -721,7 +721,8 @@ Shuah Khan <shuah@kernel.org> <shuahkhan@gmail.com>
		Shuah Khan <shuah@kernel.org> <shuah.khan@hp.com>
		Shuah Khan <shuah@kernel.org> <shuahkh@osg.samsung.com>
		Shuah Khan <shuah@kernel.org> <shuah.kh@samsung.com>
		Sibi Sankar <quic_sibis@quicinc.com> <sibis@codeaurora.org>
		Sibi Sankar <sibi.sankar@oss.qualcomm.com> <sibis@codeaurora.org>
		Sibi Sankar <sibi.sankar@oss.qualcomm.com> <quic_sibis@quicinc.com>
		Sid Manning <quic_sidneym@quicinc.com> <sidneym@codeaurora.org>
		Simon Arlott <simon@octiron.net> <simon@fire.lp0.eu>
		Simona Vetter <simona.vetter@ffwll.ch> <daniel.vetter@ffwll.ch>

Documentation/accounting/delay-accounting.rst

+58 −33

Original line number	Diff line number	Diff line
		@@ -134,47 +134,72 @@ The above command can be used with -v to get more debug information.

		After the system starts, use `delaytop` to get the system-wide delay information,
		which includes system-wide PSI information and Top-N high-latency tasks.
		Note: PSI support requires `CONFIG_PSI=y` and `psi=1` for full functionality.

		`delaytop` supports sorting by CPU latency in descending order by default,
		displays the top 20 high-latency tasks by default, and refreshes the latency
		data every 2 seconds by default.
		`delaytop` is an interactive tool for monitoring system pressure and task delays.
		It supports multiple sorting options, display modes, and real-time keyboard controls.

		Get PSI information and Top-N tasks delay, since system boot::
		Basic usage with default settings (sorts by CPU delay, shows top 20 tasks, refreshes every 2 seconds)::

		bash# ./delaytop
		System Pressure Information: (avg10/avg60/avg300/total)
		CPU some: 0.0%/ 0.0%/ 0.0%/ 345(ms)
		System Pressure Information: (avg10/avg60vg300/total)
		CPU some: 0.0%/ 0.0%/ 0.0%/ 106137(ms)
		CPU full: 0.0%/ 0.0%/ 0.0%/ 0(ms)
		Memory full: 0.0%/ 0.0%/ 0.0%/ 0(ms)
		Memory some: 0.0%/ 0.0%/ 0.0%/ 0(ms)
		IO full: 0.0%/ 0.0%/ 0.0%/ 65(ms)
		IO some: 0.0%/ 0.0%/ 0.0%/ 79(ms)
		IO full: 0.0%/ 0.0%/ 0.0%/ 2240(ms)
		IO some: 0.0%/ 0.0%/ 0.0%/ 2783(ms)
		IRQ full: 0.0%/ 0.0%/ 0.0%/ 0(ms)
		Top 20 processes (sorted by CPU delay):
		PID TGID COMMAND CPU(ms) IO(ms) SWAP(ms) RCL(ms) THR(ms) CMP(ms) WP(ms) IRQ(ms)
		----------------------------------------------------------------------------------------------
		161 161 zombie_memcg_re 1.40 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		130 130 blkcg_punt_bio 1.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		444 444 scsi_tmf_0 0.73 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		1280 1280 rsyslogd 0.53 0.04 0.00 0.00 0.00 0.00 0.00 0.00
		12 12 ksoftirqd/0 0.47 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		1277 1277 nbd-server 0.44 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		308 308 kworker/2:2-sys 0.41 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		55 55 netns 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		1187 1187 acpid 0.31 0.03 0.00 0.00 0.00 0.00 0.00 0.00
		6184 6184 kworker/1:2-sys 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		186 186 kaluad 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		18 18 ksoftirqd/1 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		185 185 kmpath_rdacd 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		190 190 kstrp 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		2759 2759 agetty 0.20 0.03 0.00 0.00 0.00 0.00 0.00 0.00
		1190 1190 kworker/0:3-sys 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		1272 1272 sshd 0.15 0.04 0.00 0.00 0.00 0.00 0.00 0.00
		1156 1156 license 0.15 0.11 0.00 0.00 0.00 0.00 0.00 0.00
		134 134 md 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00
		6142 6142 kworker/3:2-xfs 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00

		Dynamic interactive interface of delaytop::
		[o]sort [M]memverbose [q]quit
		Top 20 processes (sorted by cpu delay):
		PID TGID COMMAND CPU(ms) IO(ms) IRQ(ms) MEM(ms)
		------------------------------------------------------------------------
		110 110 kworker/15:0H-s 27.91 0.00 0.00 0.00
		57 57 cpuhp/7 3.18 0.00 0.00 0.00
		99 99 cpuhp/14 2.97 0.00 0.00 0.00
		51 51 cpuhp/6 0.90 0.00 0.00 0.00
		44 44 kworker/4:0H-sy 0.80 0.00 0.00 0.00
		60 60 ksoftirqd/7 0.74 0.00 0.00 0.00
		76 76 idle_inject/10 0.31 0.00 0.00 0.00
		100 100 idle_inject/14 0.30 0.00 0.00 0.00
		1309 1309 systemsettings 0.29 0.00 0.00 0.00
		45 45 cpuhp/5 0.22 0.00 0.00 0.00
		63 63 cpuhp/8 0.20 0.00 0.00 0.00
		87 87 cpuhp/12 0.18 0.00 0.00 0.00
		93 93 cpuhp/13 0.17 0.00 0.00 0.00
		1265 1265 acpid 0.17 0.00 0.00 0.00
		1552 1552 sshd 0.17 0.00 0.00 0.00
		2584 2584 sddm-helper 0.16 0.00 0.00 0.00
		1284 1284 rtkit-daemon 0.15 0.00 0.00 0.00
		1326 1326 nde-netfilter 0.14 0.00 0.00 0.00
		27 27 cpuhp/2 0.13 0.00 0.00 0.00
		631 631 kworker/11:2-rc 0.11 0.00 0.00 0.00

		Interactive keyboard controls during runtime::

		o - Select sort field (CPU, IO, IRQ, Memory, etc.)
		M - Toggle display mode (Default/Memory Verbose)
		q - Quit

		Available sort fields(use -s/--sort or interactive command)::

		cpu(c) - CPU delay
		blkio(i) - I/O delay
		irq(q) - IRQ delay
		mem(m) - Total memory delay
		swapin(s) - Swapin delay (memory verbose mode only)
		freepages(r) - Freepages reclaim delay (memory verbose mode only)
		thrashing(t) - Thrashing delay (memory verbose mode only)
		compact(p) - Compaction delay (memory verbose mode only)
		wpcopy(w) - Write page copy delay (memory verbose mode only)

		Advanced usage examples::

		# ./delaytop -s blkio
		Sorted by IO delay

		# ./delaytop -s mem -M
		Sorted by memory delay in memory verbose mode

		# ./delaytop -p pid
		Print delayacct stats

Documentation/admin-guide/kernel-parameters.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -4603,7 +4603,7 @@
		bit 2: print timer info
		bit 3: print locks info if CONFIG_LOCKDEP is on
		bit 4: print ftrace buffer
		bit 5: replay all messages on consoles at the end of panic
		bit 5: replay all kernel messages on consoles at the end of panic
		bit 6: print all CPUs backtrace (if available in the arch)
		bit 7: print only tasks in uninterruptible (blocked) state
		Be aware that this option may print a _lot_ of lines,

Documentation/admin-guide/sysctl/kernel.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -890,7 +890,7 @@ bit 1 print system memory info
		bit 2 print timer info
		bit 3 print locks info if ``CONFIG_LOCKDEP`` is on
		bit 4 print ftrace buffer
		bit 5 replay all messages on consoles at the end of panic
		bit 5 replay all kernel messages on consoles at the end of panic
		bit 6 print all CPUs backtrace (if available in the arch)
		bit 7 print only tasks in uninterruptible (blocked) state
		===== ============================================

Documentation/dev-tools/kcov.rst

+6 −1

Original line number	Diff line number	Diff line
		@@ -361,7 +361,12 @@ local tasks spawned by the process and the global task that handles USB bus #1:
		*/
		sleep(2);

		n = __atomic_load_n(&cover[0], __ATOMIC_RELAXED);
		/*
		* The load to the coverage count should be an acquire to pair with
		* pair with the corresponding write memory barrier (smp_wmb()) on
		* the kernel-side in kcov_move_area().
		*/
		n = __atomic_load_n(&cover[0], __ATOMIC_ACQUIRE);
		for (i = 0; i < n; i++)
		printf("0x%lx\n", cover[i + 1]);
		if (ioctl(fd, KCOV_DISABLE, 0))