This behaviour is probably due to a past behaviour of clang, where it
always emitted frame pointer code.
This is no longer true for clang on netbsd, and I don't think it was true
for GCC.
Meanwhile, this flag bleeds into pkgsrc where it breaks random packages,
requiring workarounds like lang/ruby*-base/hacks.mk.
KLEAK was a nice feature and served its purpose; it allowed us to detect
dozens of info leaks on the kernel->userland boundary, and thanks to it we
tackled a good part of the infoleak problem 1.5 years ago.
Nowadays however, we have kMSan, which can detect uninitialized memory in
the kernel. kMSan supersedes KLEAK: it can detect what KLEAK was able to
detect, but in addition, (1) it operates in all of the kernel and not just
the kernel->userland boundary, (2) it requires no user interaction, and (3)
it is deterministic and not statistical.
That makes kMSan the feature of choice to detect info leaks nowadays;
people interested in detecting info leaks should boot a kMSan kernel and
just wait for the magic to happen.
KLEAK was a good ride, and a fun project, but now is time for it to go.
Discussed with several people, including Thomas Barabosch.
Associates a constructor and destructor with the percpu. Currently
the constructor runs immediately, but in principle we could use the
same API for future CPU hotplug support.
This lets you sleep for allocation or draining users before
deallocation when setting up or tearing down a percpu -- currently we
have many abuses of percpu_foreach in tree for that purpose.
Proposed on tech-kern:
https://mail-index.NetBSD.org/tech-kern/2020/01/30/msg026036.html
At this point it is highly unlikely this 1999 device still has users,
but it still comes up in the context of maxv's USB-fuzzing (and any device
could pretend to be a urio(4)), so it's best to get rid of it.
Renamed all major entries to obsolete, as was done in previous removals.
This still requires an update to sanitizers, but they're located in
"external", perhaps it should be first committed upstream?
Proposed on tech-kern a month ago.
If \*[title-section] is non-empty, use it to override the title
instead of appending it. Nothing in the tree uses title-section
currently, so it shouldn't affect any existing document.
This override will be used by the installation notes where the default
title is less than helpful.
Discussed on tech-kern:
https://mail-index.NetBSD.org/tech-kern/2020/01/13/msg025938.html
This was never (intentionally) enabled by default, and the design has
some shortcomings. You can get mostly the same results with ktrace,
as in usr.bin/make/filemon/filemon_ktrace.c which is now used instead
of filemon for make's meta mode.
If applications require higher performance than ktrace, or nesting
that ktrace doesn't support, we might consider adding something back
into the vfs system calls themselves, without hijacking the syscall
table. (Might want a more reliable output format too, e.g. one that
can handle newlines in file names.)
This is a driver for a "nonsense machine" made by the art group Maywa-Denki
in 2008. It was disabled by default.
Unfortunately even so it draws development attention (flaws found in the
code, MP-ification needs) and it is best not to continue to maintain this
driver.
Proposed without objections on tech-kern.
Add link0 (IFF_LINK0) flag to map INIT state to LINK_STATE_DOWN
instead of LINK_STATE_UNKNOWN. This allows routing software to
suppress routes to the interface of the carp interface when in
init state (e. g. link down in the parent interface).
fcambus