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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-09 20:22:42 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-09 20:22:42 +0300 |
| commit | c4703acd6d4a58dc4b31ad2a8f8b14becb898d25 (patch) | |
| tree | 722bea1c4e9dc4230e7a2828a52fb4d5a55214b3 /lib | |
| parent | a448c643bc49f14bb3aae68ee7085b4c7f6207d8 (diff) | |
| parent | 943ca6ad81e5b37bd5d22cbab5ad06dc97fc001c (diff) | |
| download | linux-c4703acd6d4a58dc4b31ad2a8f8b14becb898d25.tar.xz | |
Merge tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Allow to sort mixed lines by an extra information about the caller
- Remove no longer used LOG_PREFIX.
- Some clean up and documentation update.
* tag 'printk-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
printk/docs: Add extra integer types to printk-formats
printk: Remove no longer used LOG_PREFIX.
lib/vsprintf: Remove %pCr remnant in comment
printk: Pass caller information to log_store().
printk: Add caller information to printk() output.
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 17 | ||||
| -rw-r--r-- | lib/vsprintf.c | 1 |
2 files changed, 17 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index e718487c97c3..91ed81250fb3 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -17,6 +17,23 @@ config PRINTK_TIME The behavior is also controlled by the kernel command line parameter printk.time=1. See Documentation/admin-guide/kernel-parameters.rst +config PRINTK_CALLER + bool "Show caller information on printks" + depends on PRINTK + help + Selecting this option causes printk() to add a caller "thread id" (if + in task context) or a caller "processor id" (if not in task context) + to every message. + + This option is intended for environments where multiple threads + concurrently call printk() for many times, for it is difficult to + interpret without knowing where these lines (or sometimes individual + line which was divided into multiple lines due to race) came from. + + Since toggling after boot makes the code racy, currently there is + no option to enable/disable at the kernel command line parameter or + sysfs interface. + config CONSOLE_LOGLEVEL_DEFAULT int "Default console loglevel (1-15)" range 1 15 diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 30b00de4f321..791b6fa36905 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1931,7 +1931,6 @@ char *device_node_string(char *buf, char *end, struct device_node *dn, * (legacy clock framework) of the clock * - 'Cn' For a clock, it prints the name (Common Clock Framework) or address * (legacy clock framework) of the clock - * - 'Cr' For a clock, it prints the current rate of the clock * - 'G' For flags to be printed as a collection of symbolic strings that would * construct the specific value. Supported flags given by option: * p page flags (see struct page) given as pointer to unsigned long |