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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-05 20:16:18 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-05 20:16:18 +0300
commita65981109f294ba7e64b33ad3b4575a4636fce66 (patch)
tree1061a49f11544e18775630938a8bc53920fa0421 /Documentation
parent3fed6ae4b027f9c93be18520f87bd06bdffd196b (diff)
parentb685a7350ae76bc0f388e24b36d06a63776c68ee (diff)
downloadlinux-a65981109f294ba7e64b33ad3b4575a4636fce66.tar.xz
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton: - procfs updates - various misc bits - lib/ updates - epoll updates - autofs - fatfs - a few more MM bits * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (58 commits) mm/page_io.c: fix polled swap page in checkpatch: add Co-developed-by to signature tags docs: fix Co-Developed-by docs drivers/base/platform.c: kmemleak ignore a known leak fs: don't open code lru_to_page() fs/: remove caller signal_pending branch predictions mm/: remove caller signal_pending branch predictions arch/arc/mm/fault.c: remove caller signal_pending_branch predictions kernel/sched/: remove caller signal_pending branch predictions kernel/locking/mutex.c: remove caller signal_pending branch predictions mm: select HAVE_MOVE_PMD on x86 for faster mremap mm: speed up mremap by 20x on large regions mm: treewide: remove unused address argument from pte_alloc functions initramfs: cleanup incomplete rootfs scripts/gdb: fix lx-version string output kernel/kcov.c: mark write_comp_data() as notrace kernel/sysctl: add panic_print into sysctl panic: add options to print system info when panic happens bfs: extra sanity checking and static inode bitmap exec: separate MM_ANONPAGES and RLIMIT_STACK accounting ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt8
-rw-r--r--Documentation/process/coding-style.rst3
-rw-r--r--Documentation/process/submitting-patches.rst4
-rw-r--r--Documentation/sysctl/kernel.txt17
4 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 408781ee142c..e7b5c49702bb 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3092,6 +3092,14 @@
timeout < 0: reboot immediately
Format: <timeout>
+ panic_print= Bitmask for printing system info when panic happens.
+ User can chose combination of the following bits:
+ bit 0: print all tasks info
+ 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
+
panic_on_warn panic() instead of WARN(). Useful to cause kdump
on a WARN().
diff --git a/Documentation/process/coding-style.rst b/Documentation/process/coding-style.rst
index 277c113376a6..b78dd680c038 100644
--- a/Documentation/process/coding-style.rst
+++ b/Documentation/process/coding-style.rst
@@ -443,6 +443,9 @@ In function prototypes, include parameter names with their data types.
Although this is not required by the C language, it is preferred in Linux
because it is a simple way to add valuable information for the reader.
+Do not use the `extern' keyword with function prototypes as this makes
+lines longer and isn't strictly necessary.
+
7) Centralized exiting of functions
-----------------------------------
diff --git a/Documentation/process/submitting-patches.rst b/Documentation/process/submitting-patches.rst
index c0917107b90a..30dc00a364e8 100644
--- a/Documentation/process/submitting-patches.rst
+++ b/Documentation/process/submitting-patches.rst
@@ -510,7 +510,7 @@ tracking your trees, and to people trying to troubleshoot bugs in your
tree.
-12) When to use Acked-by:, Cc:, and Co-Developed-by:
+12) When to use Acked-by:, Cc:, and Co-developed-by:
-------------------------------------------------------
The Signed-off-by: tag indicates that the signer was involved in the
@@ -543,7 +543,7 @@ person it names - but it should indicate that this person was copied on the
patch. This tag documents that potentially interested parties
have been included in the discussion.
-A Co-Developed-by: states that the patch was also created by another developer
+A Co-developed-by: states that the patch was also created by another developer
along with the original author. This is useful at times when multiple people
work on a single patch. Note, this person also needs to have a Signed-off-by:
line in the patch as well.
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 1b8775298cf7..c0527d8a468a 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -60,6 +60,7 @@ show up in /proc/sys/kernel:
- panic_on_stackoverflow
- panic_on_unrecovered_nmi
- panic_on_warn
+- panic_print
- panic_on_rcu_stall
- perf_cpu_time_max_percent
- perf_event_paranoid
@@ -654,6 +655,22 @@ a kernel rebuild when attempting to kdump at the location of a WARN().
==============================================================
+panic_print:
+
+Bitmask for printing system info when panic happens. User can chose
+combination of the following bits:
+
+bit 0: print all tasks info
+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
+
+So for example to print tasks and memory info on panic, user can:
+ echo 3 > /proc/sys/kernel/panic_print
+
+==============================================================
+
panic_on_rcu_stall:
When set to 1, calls panic() after RCU stall detection messages. This