Timestamps in kernel log comes from monotonic clocksource which does not
tick when system suspended. Suspended time easily sums into hours and days
rendering human readable timestamps in dmesg useless.
Adjusting timestamps accouring to current delta between boottime and
monotonic clocksources produces accurate timestamps for messages printed
since last resume. Which are supposed to be most interesting.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
It's mostly wrappers for compatibility and another trivial stuff etc.
Let's keep it as public domain to make it more portable to LGPL, GPL
and BSD code.
Signed-off-by: Karel Zak <kzak@redhat.com>
CC: Sami Kerola <kerolasa@iki.fi>
CC: Ruediger Meier <ruediger.meier@ga-group.nl>
It seems that static builds require -lpthread for timer_* functions.
It's better to keep it out of our libs (e.g. libmount) to avoid
unnecessary dependence.
Signed-off-by: Karel Zak <kzak@redhat.com>
Signal ALRM raised by the timer, and the timer only, will be considered
as a timeout criteria.
Secondly time interval is made to use monotonic clock. Documentation of
ITIMER_REAL is unclear whether that time is affected various sources of
clock skew, or does it even tick when system is suspended.
Reviewed-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Konstantin Khlebnikov
Karel Zak
Sami Kerola
Ruediger Meier