[RFC PATCH 3/3] block_dump: remove comments in docs
From: "zhangyi (F)" <yi.zhang@huawei.com>
Date: 2021-03-13 02:56:19
Also in:
linux-ext4, linux-fsdevel
Subsystem:
documentation, memory management - core, the rest · Maintainers:
Jonathan Corbet, Andrew Morton, David Hildenbrand, Linus Torvalds
Now block_dump feature is gone, remove all comments in docs. Signed-off-by: zhangyi (F) <yi.zhang@huawei.com> --- Documentation/admin-guide/laptops/laptop-mode.rst | 11 ----------- Documentation/admin-guide/sysctl/vm.rst | 8 -------- 2 files changed, 19 deletions(-)
diff --git a/Documentation/admin-guide/laptops/laptop-mode.rst b/Documentation/admin-guide/laptops/laptop-mode.rst
index c984c4262f2e..b61cc601d298 100644
--- a/Documentation/admin-guide/laptops/laptop-mode.rst
+++ b/Documentation/admin-guide/laptops/laptop-mode.rst@@ -101,17 +101,6 @@ this results in concentration of disk activity in a small time interval which occurs only once every 10 minutes, or whenever the disk is forced to spin up by a cache miss. The disk can then be spun down in the periods of inactivity. -If you want to find out which process caused the disk to spin up, you can -gather information by setting the flag /proc/sys/vm/block_dump. When this flag -is set, Linux reports all disk read and write operations that take place, and -all block dirtyings done to files. This makes it possible to debug why a disk -needs to spin up, and to increase battery life even more. The output of -block_dump is written to the kernel output, and it can be retrieved using -"dmesg". When you use block_dump and your kernel logging level also includes -kernel debugging messages, you probably want to turn off klogd, otherwise -the output of block_dump will be logged, causing disk activity that is not -normally there. - Configuration -------------
diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst
index 586cd4b86428..3ca6679f16ea 100644
--- a/Documentation/admin-guide/sysctl/vm.rst
+++ b/Documentation/admin-guide/sysctl/vm.rst@@ -25,7 +25,6 @@ files can be found in mm/swap.c. Currently, these files are in /proc/sys/vm: - admin_reserve_kbytes -- block_dump - compact_memory - compaction_proactiveness - compact_unevictable_allowed
@@ -106,13 +105,6 @@ On x86_64 this is about 128MB. Changing this takes effect whenever an application requests memory. -block_dump -========== - -block_dump enables block I/O debugging when set to a nonzero value. More -information on block I/O debugging is in Documentation/admin-guide/laptops/laptop-mode.rst. - - compact_memory ==============
--
2.25.4