RFR: 8255973: Add more logging to debug JDK-8255917 [v3]
Yumin Qi
minqi at openjdk.java.net
Thu Nov 12 05:15:09 UTC 2020
> Hi, Please review
>
> JDK-8255917 failed on not finding the committed region from the _reserved_regions list when try to add the region to the committed list. It looks like possible the region was released without logged.
> Added a log tag for tracing Native Memory Tracking (NMT) add/remove recorded info. This could help us to identify the problem for NMT or the code behind NMT. Function pd_attempt_reserve_memory_at could fail, but no message logged, so added a logging for its failure.
>
> Tests: tier1-4, local jtreg.
Yumin Qi has updated the pull request incrementally with one additional commit since the last revision:
Make nmt log at debug level, and attempt_reserve_memory_at failed log to os+metaspace debug level
-------------
Changes:
- all: https://git.openjdk.java.net/jdk/pull/1150/files
- new: https://git.openjdk.java.net/jdk/pull/1150/files/fd827f0c..67082078
Webrevs:
- full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1150&range=02
- incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1150&range=01-02
Stats: 17 lines in 3 files changed: 3 ins; 0 del; 14 mod
Patch: https://git.openjdk.java.net/jdk/pull/1150.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/1150/head:pull/1150
PR: https://git.openjdk.java.net/jdk/pull/1150
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