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Diffstat (limited to 'Documentation/ABI/testing/dev-kmsg')
| -rw-r--r-- | Documentation/ABI/testing/dev-kmsg | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/dev-kmsg b/Documentation/ABI/testing/dev-kmsg index bb820be48179..fff817efa508 100644 --- a/Documentation/ABI/testing/dev-kmsg +++ b/Documentation/ABI/testing/dev-kmsg @@ -98,4 +98,13 @@ Description: The /dev/kmsg character device node provides userspace access logic is used internally when messages are printed to the console, /proc/kmsg or the syslog() syscall. + By default, kernel tries to avoid fragments by concatenating + when it can and fragments are rare; however, when extended + console support is enabled, the in-kernel concatenation is + disabled and /dev/kmsg output will contain more fragments. If + the log consumer performs concatenation, the end result + should be the same. In the future, the in-kernel concatenation + may be removed entirely and /dev/kmsg users are recommended to + implement fragment handling. + Users: dmesg(1), userspace kernel log consumers |