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value and key
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In trying to track down a stupid linker bug, I noticed a bunch of
memset() calls that should be using memzero() to make it more "obvious"
that the options are correct (i.e. 0 is not the length, but the data to
set). So fix up all current calls to memset(foo, 0, length) to
memzero(foo, length).
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SipHash appears to be the new gold standard for hashing smaller strings
for hashtables these days, so let's make use of it.
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Instead of fixing the hashmap bucket array to 127 entries dynamically
size it, starting with a smaller one of 31. As soon as a fill level of
75% is reached, quadruple the size, and so on.
This should siginficantly optimize the lookup time in large tables
(from O(n) back to O(1)), and save memory on smaller tables (which most
are).
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that work on .d/ directories
This unifies much of the logic behind them:
- All four will now ofllow the rule that the earlier file and earlier
assignment in the .d/ directories wins. Before, sysctl was the only
outlier, where the later setting always won.
- All four now support getopt() and --help on the command line.
- All four can now handle specification of configuration file names on
the command line to apply. The tools will automatically find them, and
apply them. Previously only tmpfiles could do that. This is useful for
%post scripts in RPMs and suchlike.
- This fixes various error path issues in conf_files_list()
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Actually, one might want to run valgrind even on optimized code.
Now the same check is used in the jenkins hash functions and
hashtable.
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When traversing entry array chains for a bisection or for retrieving an
item by index we previously always started at the beginning of the
chain. Since we tend to look at the same chains repeatedly, let's cache
where we have been the last time, and maybe we can skip ahead with this
the next time.
This turns most bisections and index lookups from O(log(n)*log(n)) into
O(log(n)). More importantly however, we seek around on disk much less,
which is good to reduce buffer cache and seek times on rotational disks.
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This now matches the JSON serialization spec from:
http://www.freedesktop.org/wiki/Software/systemd/json
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entries of the journal
The new 'unique' API allows listing all unique field values that a field
specified by a field name can take in all entries of the journal. This
allows answering queries such as "What units logged to the journal?",
"What hosts have logged into the journal?", "Which boot IDs have logged
into the journal?".
Ultimately this allows implementation of tools similar to lastlog based
on journal data.
Note that listing these field values will not work for journal files
created with older journald, as the field values are not indexed in
older files.
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https://bugzilla.redhat.com/show_bug.cgi?id=845028
https://bugzilla.redhat.com/show_bug.cgi?id=846483
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In some cases, like wrong configuration, restarting after error
does not help, so administrator can specify statuses by RestartPreventExitStatus
which will not cause restart of a service.
Sometimes you have non-standart exit status, so this can be specified
by SuccessfulExitStatus.
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We finally got the OK from all contributors with non-trivial commits to
relicense systemd from GPL2+ to LGPL2.1+.
Some udev bits continue to be GPL2+ for now, but we are looking into
relicensing them too, to allow free copy/paste of all code within
systemd.
The bits that used to be MIT continue to be MIT.
The big benefit of the relicensing is that closed source code may now
link against libsystemd-login.so and friends.
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internal libraries
Before:
$ ldd /lib/systemd/systemd-timestamp
linux-vdso.so.1 => (0x00007fffb05ff000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f90aac57000)
libcap.so.2 => /lib64/libcap.so.2 (0x00007f90aaa53000)
librt.so.1 => /lib64/librt.so.1 (0x00007f90aa84a000)
libc.so.6 => /lib64/libc.so.6 (0x00007f90aa494000)
/lib64/ld-linux-x86-64.so.2 (0x00007f90aae90000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f90aa290000)
libattr.so.1 => /lib64/libattr.so.1 (0x00007f90aa08a000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f90a9e6e000)
After:
$ ldd systemd-timestamp
linux-vdso.so.1 => (0x00007fff3cbff000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f5eaa1c3000)
librt.so.1 => /lib64/librt.so.1 (0x00007f5ea9fbb000)
libc.so.6 => /lib64/libc.so.6 (0x00007f5ea9c04000)
/lib64/ld-linux-x86-64.so.2 (0x00007f5eaa3fc000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f5ea9a00000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f5ea97e4000)
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