livedump: add an option for dump compression
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Authored by mhorne on Jan 27 2022, 9:35 PM.

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Details

Reviewers

markj
kib

Summary

Add the kern.livedump_compression sysctl specifying the desired
compression to be applied to live kernel minidumps. This will be
manipulated by savecore(8).

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Unit

No Test Coverage

Build Status

Buildable 44129
Build 41017: arc lint + arc unit

Event Timeline

mhorne created this revision.Jan 27 2022, 9:35 PM

Herald added a subscriber: imp. · View Herald TranscriptJan 27 2022, 9:35 PM

mhorne requested review of this revision.Jan 27 2022, 9:35 PM

Harbormaster completed remote builds in B44129: Diff 102015.Jan 27 2022, 9:35 PM

mhorne added a parent revision: D34068: Split out dumper allocation from list insertion.Jan 27 2022, 9:35 PM

mhorne mentioned this in D34068: Split out dumper allocation from list insertion.Feb 2 2022, 3:45 PM

markj added inline comments.Feb 7 2022, 3:49 PM

sys/kern/kern_vnodedumper.c
92	The desire for this parameter is another sign that an ioctl is a better interface for the livedumper, IMO.

mhorne mentioned this in D34209: mem(4): allow configuring livedump via ioctl.Feb 8 2022, 8:19 PM

mhorne added inline comments.Feb 8 2022, 8:33 PM

sys/kern/kern_vnodedumper.c
92	Point taken, see D34209.

Now obsolete.

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sys/

kern/

kern_vnodedumper.c

43 lines

Diff 102015

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sys/kern/kern_vnodedumper.c

livedump: add an option for dump compressionAbandonedPublicActions