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block_dump: remove comments in docs

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Now block_dump feature is gone, remove all comments in docs.

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210313030146.2882027-4-yi.zhang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
zhangyi (F) 2021-03-13 11:01:46 +08:00 committed by Jens Axboe
parent 3af3d772f7
commit 51fd43e280
2 changed files with 0 additions and 19 deletions
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11
Documentation/admin-guide/laptops/laptop-mode.rst
View file

@ -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
-------------

8
Documentation/admin-guide/sysctl/vm.rst
View file

@ -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
==============