linux-kernel - [PATCH 0/11] dynamic_debug: allow multiple pending queries on boot-line

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Date:	Tue, 28 Jun 2011 01:09:41 -0600
From:	Jim Cromie <jim.cromie@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gnb@...h.org, jbaron@...hat.com, bvanassche@....org, gregkh@...e.de
Subject: [PATCH 0/11] dynamic_debug: allow multiple pending queries on boot-line

This patchset extends dynamic-debug facility to allow 
use of pr_debug() within a loadable module's module_init() 
function.  Query/rules can be given on the boot-line,
and are saved to a pending list if they cannot be applied
immediately.  Later, when the module is being loaded, the
pending list is scanned, and matching rules are applied.
Thus pr_debug() calls in the module's initialization function
are active when it is invoked.

Other features:
- dynamic_debug.verbose=1 at boot-time or while running
- ddebug_query can specify multiple queries, separated by ';'
- warn on multiple uses of a single match-spec in single query
- tolerate bad queries in ddebug_query w/o taking down facility

Possible additions (not done now)

- <dbgfs>/dynamic_debug/pending
  to show pending query/rules

- scan existing pending list before adding new entry
  currently same rule can be appended multiple times

- persistent queries
  when module is unloaded, applied rules are deleted


[PATCH 01/11] dynamic_debug: allow changing of dynamic_debug verbosity any time
[PATCH 02/11] dynamic_debug: trim source-path prefix from dynamic_debug/control
[PATCH 03/11] dynamic_debug: process multiple commands on a line
[PATCH 04/11] dynamic_debug: warn when >1 of each type of match-spec is given
[PATCH 05/11] dynamic_debug: use pr_info instead of printk(KERN_INFO ..
[PATCH 06/11] dynamic_debug: KERN_ERR should not depend upon verbosity
[PATCH 07/11] dynamic_debug: dont kill entire facility on error parsing ddebug_query
[PATCH 08/11] dynamic_debug: return int from ddebug_change
[PATCH 09/11] dynamic_debug: add_to_pending() saves non-matching queries for later.
[PATCH 10/11] dynamic_debug: call apply_pending_queries from ddebug_add_module
[PATCH 11/11] dynamic_debug: document use of pendinq queries at boot-time
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