Messages in this thread | | | Date | Tue, 9 Jun 2020 04:09:01 -0700 | From | Matthew Wilcox <> | Subject | Re: [PATCH v3 1/7] Documentation: dynamic-debug: Add description of level bitmask |
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On Tue, Jun 09, 2020 at 01:45:58PM +0300, Stanimir Varbanov wrote: > +level > + The given level will be a bitmask ANDed with the level of the each ``pr_debug()`` > + callsite. This will allow to group debug messages and show only those of the > + same level. The -p flag takes precedence over the given level. Note that we can > + have up to five groups of debug messages.
That doesn't sound like a "level". printk has levels. If you ask for "level 3" messages, you get messages from levels 0, 1, 2, and 3. These seem like "types" or "groups" or something.
> + // enable all messages in file with 0x01 level bitmask > + nullarbor:~ # echo -n 'file foo.c level 0x01 +p' > > + <debugfs>/dynamic_debug/control
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