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author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-07-25 18:23:10 +0200 |
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committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2015-07-25 20:12:14 +0200 |
commit | 3db15a3f80f193826e144b1944727a65c13340fe (patch) | |
tree | f6eef1e163de6a5dccdc1067300c5fce333d722b /kern/bootstrap.h | |
parent | bb23879791cf015f17cb50b6443bac44b1cfbc72 (diff) |
The kernel keeps track of task and thread creation times by saving a
time stamp. Previously, the real-time clock was used for this. When
the real-time clock is changed, however, the reference frame for the
time stamps is lost. This surfaced in Hurd systems reporting
spuriously long uptimes.
Fix this by creating a boot-time clock and use it as reference frame
for the time stamps.
* kern/mach_clock.c (clock_boottime_offset): Create clock by keeping
track of the offset from the real-time.
(clock_boottime_update): New function.
(record_time_stamp): Use the boot-time clock for time stamps.
(read_time_stamp): New function to convert it back to real-time.
(host_set_time): Call `clock_boottime_update'.
* kern/mach_clock.h (record_time_stamp): Amend comment.
(read_time_stamp): New declaration.
* kern/task.c (task_info): Use `read_time_stamp'.
* kern/thread.c (thread_info): Likewise.
Diffstat (limited to 'kern/bootstrap.h')
0 files changed, 0 insertions, 0 deletions