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printk: add module parameter ignore_loglevel to control ignore_loglevel

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We are enabling some power features on medfield.  To test suspend-2-RAM
conveniently, we need turn on/off ignore_loglevel frequently without
rebooting.

Add a module parameter, so users can change it by:
/sys/module/printk/parameters/ignore_loglevel

Signed-off-by: Yanmin Zhang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Yanmin Zhang 2011-10-31 17:11:25 -07:00 • committed by Linus Torvalds
commit 0eca6b7c78
2 changed files with 6 additions and 0 deletions
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3
Documentation/kernel-parameters.txt
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@ -973,6 +973,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
ignore_loglevel [KNL]
Ignore loglevel setting - this will print /all/
kernel messages to the console. Useful for debugging.
We also add it as printk module parameter, so users
could change it dynamically, usually by
/sys/module/printk/parameters/ignore_loglevel.
ihash_entries= [KNL]
Set number of hash buckets for inode cache.