CVS log for src/external/cddl/osnet/dist/uts/common/fs/zfs/arc.c

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Keyword substitution: kv
Default branch: MAIN

change the ARC reclaim code to use the pagedaemon's free page target
rather than having a separate target.

fix ARC checks for available memory:
there's an extra check that we inherited from FreeBSD that tries to
detect KVA exhaustion on platforms with limited KVA, but the condition
that decided whether to use the extra check was using a FreeBSDism
that doesn't exist on NetBSD, resulting in this check being used on
all platforms.  on amd64 systems with lots of memory, this extra check
would result in the ARC thinking that it constantly needed to reclaim memory,
resulting in all the xcall threads running all the time but not doing
anything useful.  change this condition so that this extra check for
KVA exhaustion is only used on 32-bit platforms.  fixes PR 55707.

Pull up following revision(s) (requested by hannken in ticket #1250):

	external/cddl/osnet/dist/uts/common/fs/zfs/arc.c: revision 1.20

Prevent blocking l2arc_feed_thread() forever, skip the
cv_timedwait() for negative or zero ticks.

Prevent blocking l2arc_feed_thread() forever, skip the
cv_timedwait() for negative or zero ticks.

uvm_availmem(): give it a boolean argument to specify whether a recent
cached value will do, or if the very latest total must be fetched.  It can
be called thousands of times a second and fetching the totals impacts not
only the calling LWP but other CPUs doing unrelated activity in the VM
system.

Merge changes from current as of 20200406

Rename uvm_free() -> uvm_availmem().

uvmexp.free -> uvm_free()

Pull up following revision(s) (requested by sevan in ticket #540):

	external/cddl/osnet/dist/uts/common/fs/zfs/arc.c: revision 1.16

We currently lack a tunable to control ZFS prefetch, so skip the warning and
FreeBSD specific instructions on settings.

We currently lack a tunable to control ZFS prefetch, so skip the warning and
FreeBSD specific instructions on settings.

Pull up following revision(s) (requested by jmcneill in ticket #515):

	external/cddl/osnet/dist/uts/common/fs/zfs/arc.c: revision 1.15
	share/mk/bsd.own.mk: revision 1.1167
	external/cddl/osnet/dist/uts/common/os/fm.c: revision 1.2

Provide a default ptob() implementation
Need sys/atomic.h on NetBSD
Enable ZFS support on aarch64

Provide a default ptob() implementation

Sync with HEAD

Add missing part of kmem_cache cleanup.  Use Solaris argument order for
kmem_cache destructors, umem_cache_alloc() and umem_cache_free() too.

Update the kmem_cache emulation to run its callbacks with
Solaris argument order.

No functional change intended.

Sync with HEAD

merge a new version of the CDDL dtrace and ZFS code.
this changes the upstream vendor from OpenSolaris to FreeBSD,
and this version is based on FreeBSD svn r315983.

in addition to the 10 years of improvements from upstream,
this version also has these NetBSD-specific enhancements:
 - dtrace FBT probes can now be placed in kernel modules.
 - ZFS now supports mmap().

import new CDDL dtrace and ZFS code from FreeBSD svn r315983.

sync with head

extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

enough with the compile time warnings.

Disable uvm_reclaim_hook for userland builds.

Fix difference btween solaris cv_timedwait and NetBSD one. NetBSD takes
offset from current time and solaris exact time from unix born.

don't use NULL for 0

Merge NetBSD local changes to new zfs version 22 sources.

Import new Opensolaris sources for zfs/dtrace.

Opensolaris mercurial changeset: 11751:58c0c8f4305f

Cast physmem to (uint64_t) so it works on a amd64 system with more than 4Gb ram.
undef btop if it was already included from other NetBSD header file.

Register callbacks for reclaiming kvm kernel space to arc. Unregister both
kvm address space and memory callbacks from kernel during arc_fini call.

Add some NetBSD fixes which I have forgot to commit during first round.
With these patches I can build solaris and zfs module again.

Add NetBSD specific changes to OpenSolaris code. These changes were made
by Andrew Doran and me. Thank you Andrew for your great help.

Oked by core@ and ad@.

Import Opensolaris source code used with zfs port. Zfs code si from date 
200811.

Initial revision