Difference between revisions of "FAQ"
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* <b>Q</b>: Why CRIU dumps parts of read-only mappings that map the code section of a binary? For instance, there is a mapping at, say 0x400000, that maps the code of /usr/bin/something. After dump there will be at least a page at 0x400000 in the pagemap | * <b>Q</b>: Why CRIU dumps parts of read-only mappings that map the code section of a binary? For instance, there is a mapping at, say 0x400000, that maps the code of /usr/bin/something. After dump there will be at least a page at 0x400000 in the pagemap | ||
* <b>A</b>: The code section may have been COWed, for instance during dynamic load of the shared libraries. | * <b>A</b>: The code section may have been COWed, for instance during dynamic load of the shared libraries. | ||
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| + | * <b>Q</b>: Why my [[ZDTM Test Suite|test]] cannot do privileged operation, though I run zdtm.py as root? | ||
| + | * <b>A</b>: That's because zdtm.py runs all sub-tests from non-existing non-root user. If you need root prio in your sub-test add <code>'flags': 'suid'</code> into test's .desc file. | ||
[[Category: HOWTO]] | [[Category: HOWTO]] | ||
[[Category: Under the hood]] | [[Category: Under the hood]] | ||
Revision as of 13:32, 1 September 2016
The intention of this page is to hold answers to frequently (and no so frequently) asked questions as well as some random data spread among developers' heads ;-)
- Q: Why CRIU dumps parts of read-only mappings that map the code section of a binary? For instance, there is a mapping at, say 0x400000, that maps the code of /usr/bin/something. After dump there will be at least a page at 0x400000 in the pagemap
- A: The code section may have been COWed, for instance during dynamic load of the shared libraries.
- Q: Why my test cannot do privileged operation, though I run zdtm.py as root?
- A: That's because zdtm.py runs all sub-tests from non-existing non-root user. If you need root prio in your sub-test add
'flags': 'suid'into test's .desc file.