linux.git/scripts/gdb, branch master

scripts/gdb: slab: update field names of struct kmem_cache

2026-05-14T00:40:01+00:00

The commit 5ba6bc27b1f9 ("slab: decouple pointer to barn from
kmem_cache_node") reorganized the struct kmem_cache to factor out the
per-node fields to the new struct kmem_cache_per_node_ptrs.  This causes
the gdb scripts for lx-slabinfo and lx-slabtrace fail as they still
reference the old structure.

Adjust the gdb scripts to match the current state of struct kmem_cache.

Link: https://lore.kernel.org/20260427142448.666117-3-illia@yshyn.com
Fixes: 5ba6bc27b1f9 ("slab: decouple pointer to barn from kmem_cache_node")
Signed-off-by: Illia Ostapyshyn 
Acked-by: Harry Yoo (Oracle) 
Acked-by: Vlastimil Babka (SUSE) 
Cc: Florian Fainelli 
Cc: Hao Li 
Cc: Jan Kiszka 
Cc: Kieran Bingham 
Cc: Seongjun Hong 
Signed-off-by: Andrew Morton

scripts/gdb: mm: cast untyped symbols in x86_page_ops

2026-05-14T00:40:01+00:00

The symbols phys_base, _text, and _end, used in x86_page_ops are either
defined in assembly or implicitly by the linker.  Thus, they lack type
information and cause a conversion error after gdb.parse_and_eval. 
Explicitly cast these expressions to unsigned long.

Link: https://lore.kernel.org/20260427142448.666117-2-illia@yshyn.com
Fixes: 55f8b4518d14 ("scripts/gdb: implement x86_page_ops in mm.py")
Signed-off-by: Illia Ostapyshyn 
Cc: Florian Fainelli 
Cc: Jan Kiszka 
Cc: Kieran Bingham 
Cc: Vlastimil Babka 
Cc: Hao Li 
Cc: Harry Yoo 
Cc: Seongjun Hong 
Cc: 
Signed-off-by: Andrew Morton

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-17T03:11:56+00:00

Pull non-MM updates from Andrew Morton:

 - "pid: make sub-init creation retryable" (Oleg Nesterov)

   Make creation of init in a new namespace more robust by clearing away
   some historical cruft which is no longer needed. Also some
   documentation fixups

 - "selftests/fchmodat2: Error handling and general" (Mark Brown)

   Fix and a cleanup for the fchmodat2() syscall selftest

 - "lib: polynomial: Move to math/ and clean up" (Andy Shevchenko)

 - "hung_task: Provide runtime reset interface for hung task detector"
   (Aaron Tomlin)

   Give administrators the ability to zero out
   /proc/sys/kernel/hung_task_detect_count

 - "tools/getdelays: use the static UAPI headers from
   tools/include/uapi" (Thomas Weißschuh)

   Teach getdelays to use the in-kernel UAPI headers rather than the
   system-provided ones

 - "watchdog/hardlockup: Improvements to hardlockup" (Mayank Rungta)

   Several cleanups and fixups to the hardlockup detector code and its
   documentation

 - "lib/bch: fix undefined behavior from signed left-shifts" (Josh Law)

   A couple of small/theoretical fixes in the bch code

 - "ocfs2/dlm: fix two bugs in dlm_match_regions()" (Junrui Luo)

 - "cleanup the RAID5 XOR library" (Christoph Hellwig)

   A quite far-reaching cleanup to this code. I can't do better than to
   quote Christoph:

     "The XOR library used for the RAID5 parity is a bit of a mess right
      now. The main file sits in crypto/ despite not being cryptography
      and not using the crypto API, with the generic implementations
      sitting in include/asm-generic and the arch implementations
      sitting in an asm/ header in theory. The latter doesn't work for
      many cases, so architectures often build the code directly into
      the core kernel, or create another module for the architecture
      code.

      Change this to a single module in lib/ that also contains the
      architecture optimizations, similar to the library work Eric
      Biggers has done for the CRC and crypto libraries later. After
      that it changes to better calling conventions that allow for
      smarter architecture implementations (although none is contained
      here yet), and uses static_call to avoid indirection function call
      overhead"

 - "lib/list_sort: Clean up list_sort() scheduling workarounds"
   (Kuan-Wei Chiu)

   Clean up this library code by removing a hacky thing which was added
   for UBIFS, which UBIFS doesn't actually need

 - "Fix bugs in extract_iter_to_sg()" (Christian Ehrhardt)

   Fix a few bugs in the scatterlist code, add in-kernel tests for the
   now-fixed bugs and fix a leak in the test itself

 - "kdump: Enable LUKS-encrypted dump target support in ARM64 and
   PowerPC" (Coiby Xu)

   Enable support of the LUKS-encrypted device dump target on arm64 and
   powerpc

 - "ocfs2: consolidate extent list validation into block read callbacks"
   (Joseph Qi)

   Cleanup, simplify, and make more robust ocfs2's validation of extent
   list fields (Kernel test robot loves mounting corrupted fs images!)

* tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (127 commits)
  ocfs2: validate group add input before caching
  ocfs2: validate bg_bits during freefrag scan
  ocfs2: fix listxattr handling when the buffer is full
  doc: watchdog: fix typos etc
  update Sean's email address
  ocfs2: use get_random_u32() where appropriate
  ocfs2: split transactions in dio completion to avoid credit exhaustion
  ocfs2: remove redundant l_next_free_rec check in __ocfs2_find_path()
  ocfs2: validate extent block list fields during block read
  ocfs2: remove empty extent list check in ocfs2_dx_dir_lookup_rec()
  ocfs2: validate dx_root extent list fields during block read
  ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY
  ocfs2: handle invalid dinode in ocfs2_group_extend
  .get_maintainer.ignore: add Askar
  ocfs2: validate bg_list extent bounds in discontig groups
  checkpatch: exclude forward declarations of const structs
  tools/accounting: handle truncated taskstats netlink messages
  taskstats: set version in TGID exit notifications
  ocfs2/heartbeat: fix slot mapping rollback leaks on error paths
  arm64,ppc64le/kdump: pass dm-crypt keys to kdump kernel
  ...

scripts/gdb/symbols: handle module path parameters

2026-03-28T04:19:41+00:00

commit 581ee79a2547 ("scripts/gdb/symbols: make BPF debug info available
to GDB") added support to make BPF debug information available to GDB. 
However, the argument handling loop was slightly broken, causing it to
fail if further modules were passed.  Fix it to append these passed
modules to the instance variable after expansion.

Link: https://lkml.kernel.org/r/20260304110642.2020614-2-benjamin@sipsolutions.net
Fixes: 581ee79a2547 ("scripts/gdb/symbols: make BPF debug info available to GDB")
Signed-off-by: Benjamin Berg 
Reviewed-by: Johannes Berg 
Cc: Ilya Leoshkevich 
Cc: Jan Kiszka 
Cc: Kieran Bingham 
Cc: 
Signed-off-by: Andrew Morton

scripts/gdb: timerlist: Adapt to move of tk_core

2026-03-12T11:15:53+00:00

tk_core is a macro today which cannot be resolved by gdb.

Use the correct symbol expression to reference tk_core.

Fixes: 22c62b9a84b8 ("timekeeping: Introduce auxiliary timekeepers")
Signed-off-by: Thomas Weißschuh (Schneider Electric) 
Signed-off-by: Thomas Gleixner 
Link: https://patch.msgid.link/20260311-hrtimer-cleanups-v1-1-095357392669@linutronix.de

scripts/gdb: implement x86_page_ops in mm.py

2026-02-12T23:45:57+00:00

Implement all member functions of x86_page_ops strictly following the
logic of aarch64_page_ops.

This includes full support for SPARSEMEM and standard page translation
functions.

This fixes compatibility with 'lx-' commands on x86_64, preventing
AttributeErrors when using lx-pfn_to_page and others.

Link: https://lkml.kernel.org/r/20260202034241.649268-1-hsj0512@snu.ac.kr
Signed-off-by: Seongjun Hong 
Cc: Jan Kiszka 
Signed-off-by: Andrew Morton

scripts/gdb/symbols: make BPF debug info available to GDB

2025-11-20T22:03:42+00:00

One can debug BPF programs with QEMU gdbstub by setting a breakpoint on
bpf_prog_kallsyms_add(), waiting for a hit with a matching aux.name, and
then setting a breakpoint on bpf_func.  This is tedious, error-prone, and
also lacks line numbers.

Automate this in a way similar to the existing support for modules in
lx-symbols.

Enumerate and monitor changes to both BPF kallsyms and JITed progs.  For
each ksym, generate and compile a synthetic .s file containing the name,
code, and size.  In addition, if this ksym is also a prog, and not a
trampoline, add line number information.

Ensure that this is a no-op if the kernel is built without BPF support or
if "as" is missing.  In theory the "as" dependency may be dropped by
generating the synthetic .o file manually, but this is too much complexity
for too little benefit.

Now one can debug BPF progs out of the box like this:

    (gdb) lx-symbols -bpf
    (gdb) b bpf_prog_4e612a6a881a086b_arena_list_add
    Breakpoint 2 (bpf_prog_4e612a6a881a086b_arena_list_add) pending.

    # ./test_progs -t arena_list

    Thread 4 hit Breakpoint 2, bpf_prog_4e612a6a881a086b_arena_list_add ()
        at linux/tools/testing/selftests/bpf/progs/arena_list.c:51
    51              list_head = &global_head;
    (gdb) n
    bpf_prog_4e612a6a881a086b_arena_list_add () at linux/tools/testing/selftests/bpf/progs/arena_list.c:53
    53              for (i = zero; i < cnt && can_loop; i++) {

This also works for subprogs.

Link: https://lkml.kernel.org/r/20251106124600.86736-3-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich 
Cc: Alexander Gordeev 
Cc: Alexei Starovoitov 
Cc: Andrii Nakryiko 
Cc: Daniel Borkman 
Cc: Heiko Carstens 
Cc: Jan Kiszka 
Cc: Kieran Bingham 
Cc: Vasily Gorbik 
Signed-off-by: Andrew Morton

scripts/gdb/radix-tree: add lx-radix-tree-command

2025-11-20T22:03:42+00:00

Patch series "scripts/gdb/symbols: make BPF debug info available to GDB",
v2.

This series greatly simplifies debugging BPF progs when using QEMU gdbstub
by providing symbol names, sizes, and line numbers to GDB.

Patch 1 adds radix tree iteration, which is necessary for parsing
prog_idr.  Patch 2 is the actual implementation; its description contains
some details on how to use this.


This patch (of 2):

Add a function and a command to iterate over radix tree contents. 
Duplicate the C implementation in Python, but drop support for tagging.

Link: https://lkml.kernel.org/r/20251106124600.86736-1-iii@linux.ibm.com
Link: https://lkml.kernel.org/r/20251106124600.86736-2-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich 
Cc: Alexander Gordeev 
Cc: Alexei Starovoitov 
Cc: Andrii Nakryiko 
Cc: Daniel Borkman 
Cc: Heiko Carstens 
Cc: Jan Kiszka 
Cc: Kieran Bingham 
Cc: Vasily Gorbik 
Signed-off-by: Andrew Morton

hrtimer: Remove hrtimer_clock_base:: Get_time

2025-09-09T10:27:18+00:00

The get_time() callbacks always need to match the bases clockid.
Instead of maintaining that association twice in hrtimer_bases,
use a helper.

Signed-off-by: Thomas Weißschuh 
Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra (Intel) 
Link: https://lore.kernel.org/all/20250821-hrtimer-cleanup-get_time-v2-8-3ae822e5bfbd@linutronix.de

Merge tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-08-03T23:23:09+00:00

Pull non-MM updates from Andrew Morton:
 "Significant patch series in this pull request:

   - "squashfs: Remove page->mapping references" (Matthew Wilcox) gets
     us closer to being able to remove page->mapping

   - "relayfs: misc changes" (Jason Xing) does some maintenance and
     minor feature addition work in relayfs

   - "kdump: crashkernel reservation from CMA" (Jiri Bohac) switches
     us from static preallocation of the kdump crashkernel's working
     memory over to dynamic allocation. So the difficulty of a-priori
     estimation of the second kernel's needs is removed and the first
     kernel obtains extra memory

   - "generalize panic_print's dump function to be used by other
     kernel parts" (Feng Tang) implements some consolidation and
     rationalization of the various ways in which a failing kernel
     splats information at the operator

* tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (80 commits)
  tools/getdelays: add backward compatibility for taskstats version
  kho: add test for kexec handover
  delaytop: enhance error logging and add PSI feature description
  samples: Kconfig: fix spelling mistake "instancess" -> "instances"
  fat: fix too many log in fat_chain_add()
  scripts/spelling.txt: add notifer||notifier to spelling.txt
  xen/xenbus: fix typo "notifer"
  net: mvneta: fix typo "notifer"
  drm/xe: fix typo "notifer"
  cxl: mce: fix typo "notifer"
  KVM: x86: fix typo "notifer"
  MAINTAINERS: add maintainers for delaytop
  ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below()
  ucount: fix atomic_long_inc_below() argument type
  kexec: enable CMA based contiguous allocation
  stackdepot: make max number of pools boot-time configurable
  lib/xxhash: remove unused functions
  init/Kconfig: restore CONFIG_BROKEN help text
  lib/raid6: update recov_rvv.c zero page usage
  docs: update docs after introducing delaytop
  ...