PM / sleep: Mention async suspend in PM_TRACE documentation

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

Document pm_tracing actually affecting suspend in non-trivial way.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

authored by

Pavel Machek and committed by

Rafael J. Wysocki 11 years ago a03ff6f2 d78cb368

1 changed file

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Documentation

power

s2ram.txt

Documentation/power/s2ram.txt

··· 69 69 hardware during resume operations where a value can be set that will 70 70 survive a reboot. 71 71 72 + pm_trace is not compatible with asynchronous suspend, so it turns 73 + asynchronous suspend off (which may work around timing or 74 + ordering-sensitive bugs). 75 + 72 76 Consequence is that after a resume (even if it is successful) your system 73 77 clock will have a value corresponding to the magic number instead of the 74 78 correct date/time! It is therefore advisable to use a program like ntp-date