From: Vyacheslav Dubeyko <[email protected]> Subject: [PATCH 18/24] nilfs2: introduce superfluous debugging output option
This patch adds CONFIG_NILFS2_DEBUG_SHOW_SPAM kernel configuration option. This option enables output from frequently called functions or detailed debugging output from function's body. Signed-off-by: Vyacheslav Dubeyko <[email protected]> CC: Ryusuke Konishi <[email protected]> --- fs/nilfs2/Kconfig | 12 ++++++++++++ fs/nilfs2/debug.h | 22 +++++++++++++++++++++- 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/fs/nilfs2/Kconfig b/fs/nilfs2/Kconfig index c1ec3c9..39dc5c39 100644 --- a/fs/nilfs2/Kconfig +++ b/fs/nilfs2/Kconfig @@ -107,6 +107,18 @@ config NILFS2_DEBUG_BUFFER_MANAGEMENT help This option enables debugging output in page.c module. +config NILFS2_DEBUG_SHOW_SPAM + bool "Enable superfluous debugging output" + default n + help + This option enables output from frequently called functions or + detailed debugging output from function's body. Please, be + cautious with enabling the option. Because it can be resulted + in huge amount of debugging messages in system log and + performance decreasing. Please, remember that superfluos output + option is depended implicitly from options that enable output of + concrete modules of NILFS2 driver. + endif # NILFS2_DEBUG_SUBSYSTEMS endif # NILFS2_DEBUG diff --git a/fs/nilfs2/debug.h b/fs/nilfs2/debug.h index a85454c..3f3b42b 100644 --- a/fs/nilfs2/debug.h +++ b/fs/nilfs2/debug.h @@ -98,6 +98,17 @@ */ #define DBG_DUMP_STACK 0x20000000 +/* + * This flag enables output from frequently called functions or + * detailed debugging output from function's body. Please, be + * cautious with enabling the option. Because it can be resulted + * in huge amount of debugging messages in system log and + * performance decreasing. Please, remember that superfluos output + * option is depended implicitly from options that enable output of + * concrete modules of NILFS2 driver. + */ +#define DBG_SPAM 0x40000000 + #ifdef CONFIG_NILFS2_DEBUG /* Definition of flags' set for debugging */ @@ -129,6 +140,9 @@ static u32 DBG_MASK = ( #ifdef CONFIG_NILFS2_DEBUG_DUMP_STACK DBG_DUMP_STACK | #endif /* CONFIG_NILFS2_DEBUG_DUMP_STACK */ +#ifdef CONFIG_NILFS2_DEBUG_SHOW_SPAM + DBG_SPAM | +#endif /* CONFIG_NILFS2_DEBUG_SHOW_SPAM */ 0); #define NILFS2_SUBSYS_MASK 0x0FFFFFFF @@ -143,10 +157,16 @@ static u32 DBG_MASK = ( #define nilfs2_debug(flg, f, a...) \ do { \ + bool can_print_spam = DBG_MASK & DBG_SPAM; \ + bool is_spam = flg & DBG_SPAM; \ bool can_dump_stack = DBG_MASK & DBG_DUMP_STACK; \ bool should_dump_stack = flg & DBG_DUMP_STACK; \ if ((flg & NILFS2_SUBSYS_MASK) & DBG_MASK) { \ - nilfs2_printk(f, ## a); \ + if (is_spam) { \ + if (can_print_spam) \ + nilfs2_printk(f, ## a); \ + } else \ + nilfs2_printk(f, ## a); \ if (can_dump_stack && should_dump_stack) \ dump_stack(); \ } \ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
