Merge tag 'mm-nonmm-stable-2024-01-09-10-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:
 "Quite a lot of kexec work this time around. Many singleton patches in
  many places. The notable patch series are:

   - nilfs2 folio conversion from Matthew Wilcox in 'nilfs2: Folio
     conversions for file paths'.

   - Additional nilfs2 folio conversion from Ryusuke Konishi in 'nilfs2:
     Folio conversions for directory paths'.

   - IA64 remnant removal in Heiko Carstens's 'Remove unused code after
     IA-64 removal'.

   - Arnd Bergmann has enabled the -Wmissing-prototypes warning
     everywhere in 'Treewide: enable -Wmissing-prototypes'. This had
     some followup fixes:

      - Nathan Chancellor has cleaned up the hexagon build in the series
        'hexagon: Fix up instances of -Wmissing-prototypes'.

      - Nathan also addressed some s390 warnings in 's390: A couple of
        fixes for -Wmissing-prototypes'.

      - Arnd Bergmann addresses the same warnings for MIPS in his series
        'mips: address -Wmissing-prototypes warnings'.

   - Baoquan He has made kexec_file operate in a top-down-fitting manner
     similar to kexec_load in the series 'kexec_file: Load kernel at top
     of system RAM if required'

   - Baoquan He has also added the self-explanatory 'kexec_file: print
     out debugging message if required'.

   - Some checkstack maintenance work from Tiezhu Yang in the series
     'Modify some code about checkstack'.

   - Douglas Anderson has disentangled the watchdog code's logging when
     multiple reports are occurring simultaneously. The series is
     'watchdog: Better handling of concurrent lockups'.

   - Yuntao Wang has contributed some maintenance work on the crash code
     in 'crash: Some cleanups and fixes'"

* tag 'mm-nonmm-stable-2024-01-09-10-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (157 commits)
  crash_core: fix and simplify the logic of crash_exclude_mem_range()
  x86/crash: use SZ_1M macro instead of hardcoded value
  x86/crash: remove the unused image parameter from prepare_elf_headers()
  kdump: remove redundant DEFAULT_CRASH_KERNEL_LOW_SIZE
  scripts/decode_stacktrace.sh: strip unexpected CR from lines
  watchdog: if panicking and we dumped everything, don't re-enable dumping
  watchdog/hardlockup: use printk_cpu_sync_get_irqsave() to serialize reporting
  watchdog/softlockup: use printk_cpu_sync_get_irqsave() to serialize reporting
  watchdog/hardlockup: adopt softlockup logic avoiding double-dumps
  kexec_core: fix the assignment to kimage->control_page
  x86/kexec: fix incorrect end address passed to kernel_ident_mapping_init()
  lib/trace_readwrite.c:: replace asm-generic/io with linux/io
  nilfs2: cpfile: fix some kernel-doc warnings
  stacktrace: fix kernel-doc typo
  scripts/checkstack.pl: fix no space expression between sp and offset
  x86/kexec: fix incorrect argument passed to kexec_dprintk()
  x86/kexec: use pr_err() instead of kexec_dprintk() when an error occurs
  nilfs2: add missing set_freezable() for freezable kthread
  kernel: relay: remove relay_file_splice_read dead code, doesn't work
  docs: submit-checklist: remove all of "make namespacecheck"
  ...

1 files changed, 60 insertions, 0 deletions

diff --git a/Documentation/filesystems/squashfs.rst b/Documentation/filesystems/squashfs.rst
index df42106bae71..4af8d6207509 100644
--- a/Documentation/filesystems/squashfs.rst
+++ b/Documentation/filesystems/squashfs.rst
@@ -64,6 +64,66 @@ obtained from this site also.
 The squashfs-tools development tree is now located on kernel.org
 	git://git.kernel.org/pub/scm/fs/squashfs/squashfs-tools.git
 
+2.1 Mount options
+-----------------
+===================    =========================================================
+errors=%s              Specify whether squashfs errors trigger a kernel panic
+                       or not
+
+		       ==========  =============================================
+                         continue  errors don't trigger a panic (default)
+                            panic  trigger a panic when errors are encountered,
+                                   similar to several other filesystems (e.g.
+                                   btrfs, ext4, f2fs, GFS2, jfs, ntfs, ubifs)
+
+                                   This allows a kernel dump to be saved,
+                                   useful for analyzing and debugging the
+                                   corruption.
+                       ==========  =============================================
+threads=%s             Select the decompression mode or the number of threads
+
+                       If SQUASHFS_CHOICE_DECOMP_BY_MOUNT is set:
+
+		       ==========  =============================================
+                           single  use single-threaded decompression (default)
+
+                                   Only one block (data or metadata) can be
+                                   decompressed at any one time. This limits
+                                   CPU and memory usage to a minimum, but it
+                                   also gives poor performance on parallel I/O
+                                   workloads when using multiple CPU machines
+                                   due to waiting on decompressor availability.
+                            multi  use up to two parallel decompressors per core
+
+                                   If you have a parallel I/O workload and your
+                                   system has enough memory, using this option
+                                   may improve overall I/O performance. It
+                                   dynamically allocates decompressors on a
+                                   demand basis.
+                           percpu  use a maximum of one decompressor per core
+
+                                   It uses percpu variables to ensure
+                                   decompression is load-balanced across the
+                                   cores.
+                        1|2|3|...  configure the number of threads used for
+                                   decompression
+
+                                   The upper limit is num_online_cpus() * 2.
+                       ==========  =============================================
+
+                       If SQUASHFS_CHOICE_DECOMP_BY_MOUNT is **not** set and
+                       SQUASHFS_DECOMP_MULTI, SQUASHFS_MOUNT_DECOMP_THREADS are
+                       both set:
+
+		       ==========  =============================================
+                          2|3|...  configure the number of threads used for
+                                   decompression
+
+                                   The upper limit is num_online_cpus() * 2.
+                       ==========  =============================================
+
+===================    =========================================================
+
 3. Squashfs Filesystem Design
 -----------------------------