Latest revision as of 14:53, 29 April 2020

The time namespace support has been merged in the 5.6 kernel. The current implementation allows setting per-namespace offsets to the system monotonic and boot-time clocks.

The time namespace support in CRIU has been merged in the 3.14 release.

LWN article about time namespaces

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@@ Line 3: / Line 3: @@
 [https://github.com/checkpoint-restore/criu/pull/1002 The time namespace support] in CRIU has been merged in the [[Download/criu/3.14 | 3.14 release]].
-=TODO=
+[https://lwn.net/Articles/766089/ LWN article about time namespaces]
-==Maybe later==
-* Make start-time remain "unchanged" after C/R
-* arm64/arm32/s390/power64 - add archs vvar support (nit: big/little-endianess for timespec::nsec)
-* REALTIME-related:
-** REALTIME offsets
-** vvar offsets will need synchronization (like gtod_read_begin()/gtod_read_retry())
-** vfs modification/creation time should work
-** starttime in /proc/pid/stat
-** btime in /proc/stat
-** utime()/utimes()/futimesat() (with times == NULL)
-** utimensat()/futimens() - with UTIME_NOW
-** mq_timedsend()/mq_timedreceive()
-** semtimedop()
-* Adjtime (too complicated for PoC)
-* Cpu time for thread/pid/pgid (times())
-* /proc/stat ticks? (top uses them e.g.)
-* pid creation time (probably different unrelated API)
-* clock_tai - if we care about isolation from host's time
-* What about other kinds of counters like perf events and trace events?
-=Git=
-* [https://github.com/0x7f454c46/linux/tree/wip/time-ns https://github.com/0x7f454c46/linux/tree/wip/time-ns]
 =Links=

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Latest revision as of 14:53, 29 April 2020

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