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openzfs_sysctl_init() now returns void instead of int.
The ZfsArcStats->enabled flag is set inside the init function
now, instead of having to be set from its return value.
Preparation for more flag setting in Compressed ARC commit.
ZfsArcMeter_readStats() added and all Meter->values[] setting
moved to it, eliminating duplicated code in
{darwin,freebsd,linux,solaris}/Platform.c.
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Darwin and FreeBSD export zfs kstats through the
same APIs, so moving functions into a common file.
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New meter displays same ARC stats as FreeBSD top(1).
Can be extended to other platforms that support ZFS.
Pulling kstat.zfs.misc.arcstats.c_max as the meter
total, so the meter has a meaningful value to work
up to.
The Text meter displays, first, the maximum
ARC size (Meter.total), then second, the total
ARC used, using the difference between Meter.maxItems
and Meter.curItems to "hide" the used value from the
Bar and Graph drawing functions by using an index
in Meter.values[] that is beyond curItems - 1, but
less than maxItems - 1.
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Could have resulted in a buffer overflow if the
FreeBSD kernel returned more bytes than expected.
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Use the appropriate types when calling sysctl().
Currently, `unsigned long long int` is used for all sizes and on
FreeBSD/powerpc this causes all sysctl() calls in scanMemoryInfo()
to fail as they are actually of different sizes on powerpc, where
(sizeof(unsigned long long int), sizeof(u_long)) == (8, 4)
vs (8, 8) on amd64. This results in bogus memory sizes being
reported by htop.
Signed-off-by: Tobias Kortkamp <tobik@FreeBSD.org>
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alignment
Issue Github #841, Debian bug #910492
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Calls marked with xSnprintf shouldn't fail.
Abort program cleanly if any of them does.
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translate dev_t to major:minor on other platforms.
Closes #316.
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Closes #546.
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Specifically, Platform_signals[] and Platform_numberOfSignals. Both are
not supposed to be mutable. Marking them 'const' puts them into rodata
sections in binary. And for Platform_numberOfSignals, this aids
optimization (aids only Link Time Optimization for now). :)
Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
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FreeBSD: fix multithreaded CPU% in process list
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This reverts commit f554f08fa92f8440faa853b5fa4d588829959c8a.
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This involves switching from kvm_open(3) to kvm_openfiles(3). The only
difference is that the latter has saner error reporting (see the man
page for details). We can now fatally report the error rather than just
calling assert(3).
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LWPs
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With the CLAMP macro replacing the combination of MIN and MAX, we will
have at least two advantages:
1. It's more obvious semantically.
2. There are no more mixes of confusing uses like MIN(MAX(a,b),c) and
MAX(MIN(a,b),c) and MIN(a,MAX(b,c)) appearing everywhere. We unify
the 'clamping' with a single macro.
Note that the behavior of this CLAMP macro is different from
the combination `MAX(low,MIN(x,high))`.
* This CLAMP macro expands to two comparisons instead of three from
MAX and MIN combination. In theory, this makes the code slightly
smaller, in case that (low) or (high) or both are computed at
runtime, so that compilers cannot optimize them. (The third
comparison will matter if (low)>(high); see below.)
* CLAMP has a side effect, that if (low)>(high) it will produce weird
results. Unlike MIN & MAX which will force either (low) or (high) to
win. No assertion of ((low)<=(high)) is done in this macro, for now.
This CLAMP macro is implemented like described in glib
<http://developer.gnome.org/glib/stable/glib-Standard-Macros.html>
and does not handle weird uses like CLAMP(a++, low++, high--) .
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mmcco-freebsd-free
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These are never necessary when using the standard library.
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this caused htop to show processes as if freebsd kernel was their parent.
on next pass reparenting code took chance to run, and that caused process to jump around.
this fixed behaviour should be the correct one
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